Going through a rough patch but he’s not here

Hey. Month 3 post break up. I'm going through a rough patch right now and I only have my mother, when i used to have him. How do I cope? He was my bff, I told him everything and he was the one who was there for me, no he isn't and he doesn't seem to worry about me (I've given signals). I don't like this and it hurts even more. For the first time in 5 years in hurting and he's not here to help me