Why do you feel so bad on the inside?

Aren't you happy with your friends/social circle?

Or are there deeper things going? Personally I was unhappy about baggage I had from the past... bad childhood experiences I couldn't remember anymore. I don't know if that's the case with you, but you should try to find out where that unhappiness is coming from?

Knowledge about the reasons why you are unhappy is the first step to feeling better.