One of the beautiful things about our relationship with God, is that He is the one Person Whom we can never love "too much" so long as we love Him properly. You cannot love God too much as a Father, Creator, Judge, etc... Of course "spouse" is typically reserved for those who are bound to Him in the profession of religion.
For instance, I have vowed myself to God, but I never refer to Him as my Spouse, because although I have promised myself to Him, there has been nothing official done by the Church in this regard, so the sense for me is, I've made this sacrifice, but I will never know if God has accepted it until eternity. If a man makes it to the priesthood, he may be pretty sure God wanted Him to be there. But if I make a decision about myself, there is not really any way for me to know whether or not it pleased God. Whether or not He accepted what I offered. Whether or not it was His will.
But that being said, I can never love Him enough, even so. All of the love I can direct toward Him in this life, would never be as much as He deserves. But of course, God knows we are only frail human beings, and often are limited by our weakness and sinful nature, so He surely understands.
"What if I use an intime language when speaking to God?"
Well, this is not wrong, but we also must be careful not to actually think that we are equal to Him in the way we are to our intimate friends. True, God wants us to come to Him and tell Him everything, and to have a very deep love for Him, but if we find ourselves in danger of becoming proud or careless because of our intimacy, we probably should stick with more formal speech.
I know that God desires to be close to us, and for us to be close to Him, and so I try to speak to Him always openly as I would a friend, but I always try to do so with the respect I owe Him... I think of Him more as Father and Lord and King, or even the Divine Physician, Who, having created our bodies and souls, is the One who can best cure their ills. But I try not to think of Him in the same way I think of my earthly friends, because I feel it will just put me in a frame of mind where I might indeed offend Him by taking His goodness for granted. (Only the Church could say whether or not I'm right.) But that being said, one can still render to God any amount of sweetness and become very intimate with Him in a number of ways, without "going too far" (in terms of becoming proud, or careless about how we speak to Him, etc.).
Look at the sweet love a very good child bears their earthly father. What sweet sentiments, and what intimacy can exist there, without the child overstepping any boundaries of propriety. The child owes the father respect, but a little girl who called her father "papa dearest" does no disrespect to his authority or position. But if she lets herself think so casually of him as to think herself entitled to treat him however she pleases, or if she thinks herself entitled to overlook his authority, then, obviously there is a problem.
The only danger in trying to draw nearer to Our Lord in a very deep and sincere way (which we all need to do in order to achieve holiness), lies in forgetting our true position, our real lowliness, the ugliness of our sins, or the position or authority of God.
I think one holy book put it this way... If the lord of the house makes a dearly beloved servant or slave a free man, and henceforth treats him like a son, he is pleased if that servant accepts it, and is grateful for it, and happy about it. But if that servant goes so far as to forget what the lord of the house has done for him, and begins to act as though he was never a servant or slave, and begins to treat the lord of the house indifferently or as though they were equals, this does NOT please the lord of the house.
God has called us children, brothers, sisters... He has redeemed us in His Blood. He said to one chosen soul, that EACH soul is His favorite. I heard that another time, He related to a holy soul that it was once a custom (I forget where) for the man to dance to impress or "win" his bride. He said of His passion and death, "that was my dance." The words of Jesus Himself to His chosen souls are often heart-rendingly tender and sweet and intimate. And He said to one of them, that what He said, He said to every soul. There can be no question, then, of the depth, sweetness and intimacy of His love, since He has laid it out in His own words, time and time again, since the Bible. Therefore it is CERTAINLY not presumptuous to think God loves us.
Mortal sin kills the life of grace within us, but even then, God still loves us enough to want us to be returned to the life of grace. God's love is not like our love, fading or changing like the direction of the wind. Even in the state of sin, there is no soul God would just love to put in Hell. (Which is to accuse God of the lack of mercy.) He would much rather that every soul go to Heaven, even if many souls, according to justice, do not end up there.
I think that this is closely related to why despair is a sin. Despair is to doubt in the mercy and goodness and love of God to spare a soul, however blackly steeped in it's sins it may be. It is a sin for the worst sinner that has ever walked the face of the planet, to doubt that God either cannot or would not forgive them. Why? Because God is all merciful, all love. His virtues are perfect and absolute. They do not waver or become imperfect, because of anything that we do. "Or, is it not lawful for me to do what I will? is thy eye evil, because I am good?" Do we attribute imperfection to God's love or mercy, because we are wicked, and perhaps wouldn't forgive our neighbor if they so offended us? But God is perfect, and His ways are not our ways. His love cannot be tarnished or ruined. What tormented Him in the Garden, if not the thought that so many souls He loved STILL would not be saved, even with what He was about to accomplish? For what did He thirst upon the cross, if not those souls, and indeed EVERY soul?
So we must believe absolutely in His love. Of course, we may not commit the sin of presumption (to say, "He loves me so much it doesn't matter if I sin. He will forgive me" ... Yes, God will forgive us, if we are TRULY sorry. But sin is always wrong, and we may not feel free to commit it just because God is good. How can we say we are sorry, if we committed it so deliberately? God willing, if we commit the sin of presumption, hopefully we will realize how wrong we were, and repent of it! But God will not be mocked, even if He does love us!) Nevertheless, there can be no question of His love for us always. Look at the cross, and see how much He loved us. He died such a death for us, even knowing every sin that would ever be committed. He still wanted the merits of His sacrifice to be there for anyone who was willing to be sorry and return to Him.
The love of God is immense. But we can neither ignore it or deny it, nor take it for granted.