It's always good to try and focus on your studies and any interests you may have, they keep you busy, and you won't have too much time to dwell on the the disappointments you've had with girls. Personally speaking, music is a nice way to channel your emotions, it can be positive too.

You're only 20, there's still a lot of time, you will find someone sooner or later, I know how it feels to be ignored or forgotten, but you have to keep going.

Do you need a close emotional relationship with a female or do you want a girlfriend? Maybe you want to be close to your cousin in a brother/sister kind of way and you're just confused?