'"i believe in myself?"

I don't think that believing in one's self is being over-confident. I think that, in order to succeed in life, we have to believe in our ability to do so. We have to champion our own success. If you set a goal, you have to believe you can succeed. Otherwise, you may give up without applying your best effort. If you really want something in life, I think that the only way to attain it is to do so for yourself. Don't rely on other people to make you happy... don't rely on other people to fill a void in your life. Believe in yourself and be a whole person :)