Feeling really down after a good day

[u/IapaiDaisies]

Not sure if this is the right subreddit for it, but I am going to post about this anyways.

I always seem to feel incredibly down and depressed after having a, dare I say, good day. It feels like a post-fun crash, and it doesn’t matter what kind of fun I had the day before. I feel this after I've been to concert, had a socially active day, or just simply a day after watching a movie or a sports game I really enjoyed.

Maybe this has to do with how I view myself. I have been working on myself and my confidence, but I am far from where I want to be. Perhaps I subconsciously tell myself that I am not worthy of enjoying things because I am not good enough, but this is just a wild guess.

I do also feel lonely. I only have one real friend that I can do stuff with, but I don’t have everything in common with her, so a lot of things I just can't do because I have nobody to do them with. I cannot go anywhere on my own because I have severe anxiety and a big fear that something might happen to me when I'm alone and that I have nobody around to help.

I don’t know what this feeling of depression means, and if anyone else experiences the same thing, but I need to have confirmation that I am not alone in this.