Go see the show. I stayed home for 15 years drinking and feeling sorry for myself. You don't want to do that. What a waste!

I remember a time when I was very stressed out and depressed. Even then, I thought I should be going out to shows, events, etc. I was putting the pressure on myself because I felt I didn't have much fun in my life, and should be making the most of my youth. Well, I did go to a show, alone, but I couldn't enjoy it at all. I felt like I was wasting my time when I should be working or catching up on sleep. I left early and never forced myself to go out again. On the other hand, for the past week, I was feeling down but didn't want to do anything because I was feeling guilty for wasting time. I decided to watch a movie anyway, and it felt really good! I really needed the escape. Moral of the story, don't force yourself to go if you don't feel like it but do go if you think it's going to cheer you up. Do what feels right for you. There will always be other shows.

Thanks @Dowhatfeelsrightforyou. I agree with you. Accepting what I'm feeling, and doing what's best for me and no one else. I didn't end up going to the show, and I'm really glad. I know I would've regretted it. Instead I got lots of sleep and did some research on a future career option. Friday night well spent!

I can pretty much relate to everything you said, both in your original post and later comment OP. I've decided that for me, the best thing to do is still have a lot of alone time, but to go out every once in a while if someone asks me, just so I don't isolate myself too much, as that can add to depression.

Just be choosy. Don't go out unless it's something you are really looking forward to or have a good feeling about. And don't feel bad about not going to stuff either. Everyone has the right to do what they want, and what's best for them.

Solitude is a beautiful thing and the older you get the more acceptable it is to partake in it. When I was in my 20s it was mandatory to be out and about and living it up, and as a born solitarian I had many a friday night standing in some club, hearing shit music and thinking 'this is fucking lame, I'd rather be at home singing along to Marley'
Two decades later I am pretty much awash in solitude (maybe not a good thing) and spend much of my time alone...and singing along everyday. Ah, whatever...only my heart is lonely, life is good.
OP, sounds like you're in a transitional phase and doing what you've always done isn't doing anything for ya these days. Try to find some happiness in changing your ways and getting out of the routine. Comfort zones are made to be broken.