I dated this guy grant back in *10, I fell in love and he was just amazing, he was a lot like me and I honestly thought we*d be together forever.. he broke up with me 3 months later because I fell into a depression and he thought itd be better for me.. it wasn't.. it only made things worse but we've been arguing about this since.. we tried again but the same crap.. did I mention this was long distance? Yeaa it is.. by 45miles.. not too bad.. I started seeing another guy sergio, he treats me right and he hasn't yet once done anything. I love him and he wants me to trust him.. he gives me his passwords for everything and understands me.. I don't want to let go of grant but sergios there for me.. I know inside me itd break my heart to see grant with another girl but I really just don't know.. itd break his if he knew about sergio

I can't make any sense out of this story. Grant broke up with you, but it would break his heart if he knew about Sergio? You were in love and it was wonderful and amazing, but you got depressed and don't have any clue why?
Stop with all the boyfriends and find out where the depression is coming from. You are wandering around using 'love' as a crutch when you need to work on yourself. You can start by giving us some idea of what started the depression, what feelings are behind it - your or parental expectations of marriage and babies? Career? A loveless childhood?

Spend time with yourself. Focus on fixing your depression issue and take things light hearted.