First try to understand where from your failures come - this is a priceless experience.
Forget such words as "I think I can't do that" and "I'm not sure"
Start following after your look. Change your style.
Start living with the present, stop flying in the sky.
Change your behaviour, love yourself, make what you like.You're the man.
You shouldn't do what everybody do. make whatever you want.
Be open towards the society, and the society will be open for you.
Remember that if you keep doing what you did before, you'll get what you got before.