I've felt the same way, that some problems in life just don't seem to be solvable, no matter how much I try.

The best advice I can give is to keep trying different things. Read books, go to therapy, find a support group. Sometimes I read a book and get nothing from it. Then that ONE time I'll read something that gives me an a-ha moment. Suddenly, I figure out how to deal with a problem. That always feels good and gives me hope that I'll come across something else that will help.

Don't give up! Things can get better. Hope this helps.