How do I make myself feel better when I'm not the problem?

Just know that you are only capable of controlling how you react. You have absolutely no control over how others act, so as such, you should not let their actions dictate how you feel. I know it’s a lot easier said than done, but what has helped me in the past is knowing that my mood can be change by simply smiling and getting the seratonin running through my brain!

Make a list of your good qualities, take a good look in the mirror and say " I am Great, I wasn't built to please the world"

You know you're not the problem, yet that feeling won't go away. It will always eat you deep. But hey, the more you're feeling like you're the problem, the longer the feeling of insecure will linger. Just believe in yourself, that you're not the problem. Believing in yourself won't hurt the world. No matter how hard you'll think it is, always think of yourself first. Make yourself happy, and you won't regret the next actions you'll take. If you're happy, other people's thought won't bother you, and you can be whoever you want to be. Just live in the moment and be free!