I'm always having the thought that I wish I was someone else.
Why would you want to be someone else?
I whould just rather be someone more successful and better off than I am.
If you are unhappy with who you are, you should think about what you want to change about yourself instead of wishing you were someone else. It is much better to be productive and find a solution to your problems rather than just wishing you were different.
I'm going to do exactly what you just said.
I'm glad you're taking the advice to heart. If you're still struggling after trying to figure this out on your own, I would recommend talking to a therapist.