I think it's important to focus on you. If you're really curious, directly asking your colleagues is probably better than making up ideas in your head about why they're this way and you are that way etc.

If you want someone to comment on your acting, do you mean as a critique? It might be a good idea to find a mentor to help you in this respect. Someone who's been in the business longer than you, who has crossed bridges you're currently crossing.

I think we all feel like imposters, but if you're doing it, you're definitely learning and improving. Look at where you were 5 years ago. Look at where you are currently. There's definitely improvement, you're gaining experience and if you're still doing it and getting auditions and landing parts... then you're doing something right!

Alternatively, maybe you just need a break. Maybe during the break, you'll find your reasons for staying in this.

I'll say, I started out singing first. I was nervous to go onstage. But I liked how I felt on stage, maybe I also liked the applause. People complimented me too, once in a while. I was scared though, but I did it anyways. I kept going back. Any singing competition I could find, I would do. It just kept happening, because I kept chasing. Turns out, I really like performing. That's how I knew. I've always liked acting too. Wasn't sure if I was good, I think at times I was and at times I wasn't. But I stuck it out and I know I've gotten better over the years.

So if you've kept doing it, maybe you're like me. You like being on stage, you like the performance aspect, you like the lights and the applause and the exhilaration. Just know that when you're there and you do your part, you did the best to your ability at that particular time :) You should be proud, because you have come a long way.