A bit more of generic advice: Learn to be confident without counting on a girl to make you feel good. Love is a chemical reaction, you will go through withdraws, but this will pass, even if it takes several months. Also remember that our brain is hardwired to remember the positives while downplaying the negatives. There is a reason you broke up, and it will probably happen again.

I have a good amount of experience with this. After my first 3 year relationship, I was devastated, couldn't eat and all of the usual depression symptoms. I was a teen at the time. After a few months my confidence began to grow like it never had. I slept with and dated many women. I got into another LTR, which ended abruptly. At first I felt some of the same depression, but then I remembered who I was and what I could do. I don't need a girl and neither do any of you guys. We are actually benefiting them more then they are us, don't forget that!

Fast forward about a year and a half later, guess who calls? the ex gf from my second LTR. She wanted to "get together". I knew I could have her back, and I realized that I didn't want her. Give it some time guys, and you will probably realize the same thing.