Hi, i'm not in a good position to tell you this, because i'm in the same position as you except that i still have my girlfriend. I just entered college and i don't have any friends except her, so if i lose her, i'll be all alone. I almost lost her, couple of months ago, and i almost killed myself.
I know how are you feeling, but believe me, things will get better. I know you feel alone and want to kill yourself - don't. I know that that's cliché... Have you ever tried to be better than someone you knew? That's your focus now. Try to be the best at something , prove that you're a good person and that you're strong . Be a great friend.

This is probably not what you were expecting, just hope i could help a bit. You don't know me, but if you need something, just let me know.
Hope it helped a bit.

p.s. - something that helped me, was a real life psicologist.

I feel the same way:( I just been through the same exact thing and it just sucks like all I wanna do is text him but it's like I can't :( cuz then I'll loose any hope of being his friend again. There is hope that he will still be your friend just have to give him some space. I went crazy on my ex and everything before after we broke up and he ended up blocking me from everything and stuff but then 6 months later he let me back in his life and we became great friends again! And started to date again as well so there still is hope! Just don't let go of that hope! And prove to him that you are stronger! He just wants to see you happy! So show him how strong you are! Try to just keep urself busy during the no contact period I know it's really tough but the space will really help in the end! And keep ur head up cuz ur stronger then this and u can fight it and I guarantee that he will be ur friend again if that is what u really want! Just never give up! You go this!

I'm not sure how this works and I don't know if you guys will see this but thank you for the advice it's making me feel a bit better