How do you deal with feel of regret, or disappointment that you are wasting your life because you are to afraid even to go out? How do you deal with feeling that everyone around is living better life than yours?

 I've so many mixed feelings about this. This is not the best time for me rn, I see my friends posting on social media doing cool stuff, like dancing, traveling, parties, meeting with friends and I'm envious because I'd like to do that too, but somehow I can't. I feel like my life is slipping through my fingers, I'm 28 and I feel like I've never enjoyed my life. My closest friends are living in different parts of my country so we can't meet that often, they all have their own friends closer but I don't. I feel alone. 

Today I saw stories on instagram of my far friend, a belly dancer doing another great performance and I started crying over myself and how useless I am. We started belly dancing almost at the same time, 4 years ago, she is doing it to this day but I'm not. Of course I've decided to quit at some point and I regret it. Again I feel like it could have been me but of course I had to ruin that too. I'm so dissappointed with myself, again, and again. I have lost all my hobbies and I hate myself for that. i feel like my life is nothing more than a waste