Hey, stop what you are doing. Take a deep breathe. It will be alright. That thought in the back of your mind will be okay.
Don't stress out over the little things in life. Don't spend so much time being someone you aren't. Look in the mirror, do you love yourself? Are you doing the best you can in the situation you are in? If yes, then that is all that matters. Not what someone else thinks. Many people go around living in a life that they don't love because they want to impress other people. Why? The only person you need to impress is yourself.
There is always a light at the end of the tunnel. A pot of gold at the end of the rainbow. Never stop reaching for your dreams. No one should tell you that you cannot do something. If they do, they don't need to be a part of your life. However, you can't go through life along. You can't be an all star and claim you can handle everything. It is okay to get help when you need it. It is okay to cry on someone's shoulder when you need to. It doesn't show weakness, it shows that you are not afraid to seek out help.
Everything that you do everyday should not be based around someone else. It should be based on what you want and how you feel. You need to learn to love yourself. After all, you will be with yourself forever.