Dont feel any motivation to keep going

Hey im kinda new to this but i dont know what else to do lately ive been feeling really down with no motivation to anything. i have a passed history of relationships were they have ended badly and made me too depressed to do anything i would just lay in bed all day not eating or going to work/college cause it would play through my mind all the time and i couldnt sleep cause of it, i usually pick myself up cause i want to do better for my self but this time i just cant do it, i think the problem stems from my last relationship you see i was really happy with this girl and i got quite settled with her as she was perfect and we were great together and i but alot of effort into it more than i have in the past but we broke up recently cause she couldnt handle it, problem is i cant move on and everything i was motivated to do now has just crumbled i just just lay in bed all the time and hide it from everyone as they dont understand me and never have when i do open up its just sympathy, ive suffered from bouts of depression for about 3 years now ever since my first break up before that i was fine and happy to be alone i just dont know what to do anymore i hate playing this stupid game were i end up hurt more and more i try