Is it Life? Or is it me?

When I think about life, I get scarred, I'm scarred of never becoming what I always have wanted to be. Not that I won't live up to what someone else wants me to be, but what I want to be, that I won't get to, or through medical school, that I won't be good enough to get and marry the women of my dreams, that I wont raise successful children..... that I simply wont be good enough...... Am i scarred of life? or am i scarred of myself?