Find the truth then hold onto it above all else. You ARE awesome. It's not about how you feel, it's not about what others think of you, it's not about what you have, it's not about who you are with, it's not about what you don't have, it's not even about what you think about yourself. The truth you base your life on has to be much higher than all those things. It must be an absolute truth. An unchanging truth. It must be a truth that's not from this world. There's only one place to get that kind of truth. It's from your Creator and what He says about you. He is perfect in every way and He is never wrong. This is what He says about you in His letter to us. Psalm 139:14 - "I praise you, for I am fearfully and wonderfully made. Wonderful are your works; my soul knows it very well." So there you are... Hard evidence in black and white. God says you're awesome so stay in that truth and STAYAWESOME.
