You know when you spend too much time alone, you start to think a bit too much. You start to doubt. You start to question everything you're doing, everything you know, and everywhere you're going. You get lost in what you haven't done instead of cherishing your accomplishments. You start drowning in all the noise telling you you're not good enough; you won't succeed; you should give up. And the worst part, you start to believe it.
Don't deprecate yourself. You're talented, inspiring, kind, beautiful, etc. You're just letting all your doubt try to take that away from you. Whatever you dream to do, whatever you want to do with your life. Do it. Stop second-guessing. Ignore the negative commentary. Realize you're crazy, but all the best are. Try because it's better than doing nothing. Accept that rejection is inevitable, but realize it's not permanent. Remember good things take time. But most importantly, believe in yourself. Next time you question what you're doing with your life, reply with "something." Because if you believe you can do something, you will.