Don't even think about it until you are ready for a courtship-to-marriage scenario that's objectively a possibility.

I find it impossible not to think about her as I love her.

I know rationally this is the best option but I have been emotional lately and attacked very bad thoughts, both in despair and depression.

I really do love this girl and would be very upset if she forgot about me or found someone else, yet I know there isn't much I can actually do in this situation. This is very frustrating because as a man I like to feel in control or have a guarantee. If she really likes me she would wait to see me again wouldn't she?
 
I also don't to cause scandal by going near the indult (they don't have valid orders) or seeing a girl for a relationship when I'm not financially ready.

Frankly I'm worried this girl will go to hell when she died because the indult has no valid orders, meaning her confessions are not absolved, her communions aren't real, and her mass is but an imitation. I want to help her save her soul.

The best you can do is pray for her, which I'm sure you already do. May Our Lady pray and intercede for her that she may come to realize the dangers of the indult, live a holy life and die a happy death. Unfortunately many of us young men will have to wait until we are not-so-young men to be financially secure enough for marriage. Prayers for you to, we are in the same boat..may we surrender to God's will in all things 

If you don’t mind me asking, how many hours a week are you working? Any way you can increase your hours/get a second job? Many husbands work 60+ hours a week to support their families. Being single is the best time to get ahead by working like crazy. Once you have a family you will be crunched for time always. 

 Many husbands work 60+ hours a week to support their families. 

I never understood this. Are they working minimum wage? Are their wives spending too much? Shooting for a middle class lifestyle?

I know rationally this is the best option but I have been emotional lately and attacked very bad thoughts, both in despair and depression.

I really do love this girl and would be very upset if she forgot about me or found someone else, yet I know there isn't much I can actually do in this situation. This is very frustrating because as a man I like to feel in control or have a guarantee. If she really likes me she would wait to see me again wouldn't she?
 
I also don't to cause scandal by going near the indult (they don't have valid orders) or seeing a girl for a relationship when I'm not financially ready.

Frankly I'm worried this girl will go to hell when she died because the indult has no valid orders, meaning her confessions are not absolved, her communions aren't real, and her mass is but an imitation. I want to help her save her soul.

Some things, in no particular order, come to mind:

Do you actually love her or do you love being in love? It's not always easy to tell the difference when you're going through it. 

I know some will disagree and label it as "imprudent", but almost all of the couples that I know that have stayed married long term (talking 50+ years) started out with both being relatively poor. When asked, universally they agree that having both start with nothing was a boon to their relationship because they built their lives together. Everything they have is theirs together, there's no room for resentment where one feels like they've sacrificed more than the other.

I'm pretty sure none of us would exist if not for, at some point in our ancestry, our forebears being "imprudent".  

If the response is going to be something like, "well times are different, it's much harder now!", I reply with Sacred Scripture, " 8 All things are hard: man cannot explain them by word. The eye is not filled with seeing, neither is the ear filled with hearing.  9 What is it that hath been? the same thing that shall be. What is it that hath been done? the same that shall be done.  10 Nothing under the sun is new, neither is any man able to say: Behold this is new: for it hath already gone before in the ages that were before us."

I know it's difficult. You're not alone. I know there's an overwhelming number of reasons action and progress seems impossible, but it's really not.

I'm seeing more and more clearly for myself how important it is to shut it off and LIVE my life. I'm fasting all this week, if you're able, please join in. It does wonders for the body and the soul.

I'm gonna be very honest.

It is currently not looking good at all for any guys making under.. 100k to support a family. and that's if you're in a non-expensive state.. Unless you come from straight money, you are not going to be ready until you have a nest egg, and absolutely no debt.. so, probably, 28-30 years old
(and I'm not talking about keeping up with the Jones's salaries)

The expenses have SHOT UP AN UNGODLY amount worthy of straight up war in the last 2.5 years.

I am so livid thinking about how they are at war with us, and we can't really do anything about it. It makes my blood boil. And we ALLLL KNOWWW who is behind it all...

The places that are in within range for living expenses are in areas not even remotely close to most Churches/Jobs.

80% of Americans make under 100k per year...

You are the reason I had both my sons and daughters read through your posts.
An example to my boys on who not to become and to my girls on who not to consider for marriage.

Do you think there is a misunderstanding somewhere?

The OP just sounds like a man who has a lot of thoughts weighing on his shoulder when it comes to his future.  And the cards really seem to be stacked against a traditional Catholic white male. 

The posts are anonymous, so you don't really know who is saying what.

If the OP does not have family to teach him the Catholic way, then he has to come to CI or other places on the internet.  Why do people see the worst in people all the time?  Do we not trust God anymore?  Do we not trust our Guardian Angels?  Do we not trust the Sacraments?  Has the media fed us a bill of goods that even true Catholics can't seem to rise above?

Don't you think your comment was a bit presumptive and harsh?  You didn't even specify what exactly you were trying to teach your children.  What exactly in this conversation is so offensive?