Feels like everything is falling apart

I just want to get this off my chest. I broke up with my ex a month ago and everything still hurts especially cuz I’m living by myself. I really loved him, but I regret being too needy and controlling (reason of break up)I have been going to therapy and really trying to work on myself but I am still sad knowing that he will never talk to me again. I wake up in the mornings nervous and devastated that he has most likely found someone else already and I am still here discarded like trash. I worry that I will never see him again. I am losing my friends because I talk too much about my situation to them. Not only that, I am beginning to struggle in classes as well. Sometimes I really want to give up. I tried meeting other people but it makes me uncomfortable. It is so hard to continue with my life and I really wonder if something good will ever happen to me again. Any advice on how to move on or stop thinking about an ex?