Sounds like you are torn between a marriage or religious vocation.
When I was very young I too, wanted to be a nun, but my desire to have children was much greater. Today I am happy with my decision, especially when I see what happened with Vatican II.
You already know you need to pray, and you know the devil is tempting you, this guy here :devil2: does not want you to be a nun, he wants you out in the world, and the men out there today expect what they have no right to expect from young women, prior to marriage. Be careful, and may Our Lady help you choose according to the Will of God.