It feels weird to be happy

I set myself a goal this year to try head to therapy as well as go to more social events. So far, so good. I did notice that I feel much happier and less depressed but for some reasons, it feels strange. Either I shouldn't be happy as the world is still a mess or that my happiness is only going to last for so long until I go back being mostly depressed and unoptimistic.

I just want to feel alive and not having my mental health restrict me from wanting to do various stuff. For the past month, I repaired a iPod, did couple sewing project and slowly become more sociable where I'm otherwise too scared to say anything. I'm still have social anxiety but it's not as terrible as it used to be and I'm slowly facing my fears.

Maybe I'm just scared that I'm putting a lot of effort to try improve my wellbeing that if I slip back, I feel like it's a wasted effort that I had put in.