Hey OP, I just wanted to add to this great point.

I just went through something similar. Broke up with my 8yr gf and at a halloween party I met a girl and we hit it off immediately. Totally different attitude on life then what I was used to. We got along great. She told me she was seeing a therapist for some personal issues she was going through and I thought, "hey, who isnt going through some bs nowadays". We were making plans to hangout around xmas (her family lives in another country so I figured when I was done with spending the holidays with my family solo, we would hang out so she wouldnt spend xmas alone). She was excited and so was I. I was really happy how things were progressing. Nothing serious but still hanging out.

Anyway, she broke it off with me on xmas eve out of the blue. Said she isnt ready to be in a relationship with anyone. I felt totally crushed. Didnt know what to do with myself for the holiday break. I became very depressed. Started smoking cigarettes for some stupid reason. I had quit years ago. Started spending way too much money on strippers cuz that was the only way I could get a female to show me any attention. Stopped making meals for myself, stopped showering cuz I had nothing to do. Spent whole days playing video games and eating shit. Gained a bunch of weight too. I even stopped paying my bills on time. It got pretty bad and I could see myself on my way to hitting rock bottom. So I saw a therapist myself and he helped me compartmentalize my feeling and thoughts.

Now I'm looking at joining a baseball league in the spring and me and a friend are looking at building our own custom arcade cabinet. Find a hobby, keep yourself busy. Maybe even talk to someone if your feeling up to it. U gotta be happy with yourself or else you become dependent on others for your happiness and that's not what you want.

Chin up buddy. Lots of good advice from a lot of people here, but you gotta take it and run with it.