Meh most people who party are just running from themselves.
Do you really want to fit in with that type of group?
How can you fit in with people who don't know themselves? By not being yourself. And do you really want to lose yourself even more than it appears you already have? Of course not.

I'd say try to find yourself.
Try to feel comfortable being yourself.
That's a lot more complex than it sounds.

If you are never happy and comfortable with yourself are you ever going to be happy with life?