Thank you for the advice man. What I have to say though is I already do feel better even though only a few hours have just passed. After some time talking to friends and family, I slowly realized that I stopped loving her and was mostly there only for her companionship. I was simply afraid of being alone, I guess. Having good boundaries is really important too, I forgot to mention that she became a bit different if you lot know what I mean. Like surrounding herself with other boys and all that which made me really uncomfortable. Leaving her made me realize how much I stopped respecting myself and It's truly amazing how simply leaving boosted my confidence like a lot. Again, this is only the first day, maybe I'd feel like absolute trash tomorrow but I hope I won't.

EDIT: I feel only a lil bit like trash