Thank you LodewijkP. I've never in my life received better advice than the last one you gave me.
Well, I finally took some action. Today I went out with her for some coffee and I told her that I will stop seeing her for two weeks so that I can focus on my exams that are coming up. Because everytime she texts me I just get distracted too much. So it will be one big freeze out. No talking. No seeing each other. No texting.
Also told her that we should stop talking about our own problems to each other all the time. Since we are both pretty emotional persons, we just get effected by it way too much, which makes us both unhappy. We just need to deal with our own problems individually. So that's something I am going to work on. Stop being the Provider, start being the boyfriend. Trying to have more fun in the relationship
She was a bit quiet after I told her all this. She did not seem too happy, as expected, but she said she understood. Think it will be allright.
Now that I did not expect any form of texts, I felt so fucking relieved! As if I now finally have my freedom back. No plague in my head of constant worrying about her. No more being so considerate about her and her problems... no more over analyzing... Really. This feels great. I was able to work for over 5 hours for a school project! That's something I wasn't able to do before.
It's clear that I needed this space, since I now feel like I have found myself back. There's just no fear at the moment. It's amazingly divine this feeling, very zen.
I know now what to do. When the freeze out is over, I will maintain this form of being. I will not accept her shit anymore and I will not be overly considerate towards her anymore. I will think first about what I want, second about what she wants.
If that behaviour change within me will cause a problem for her, then that's her fucking problem. I will see how things will go after this freeze out. If she accepts it, then all the better. But that's something that time will tell.
For now, I'm just enjoying to be with myself again

So thank you for helping me make this decision! Could not have done it without you.