I feel better trying to solve the problems other people have than solving my own.
Why is that?
It is harder for me to help myself than others.
It's great that you like to help other people. You should want to get your own problems solved, too, though.
I am too invested in other people's problems.
It is nice to be helpful, but you should take more time for your own problems. You are doing a disservice to yourself by neglecting your needs.