The Purpose of My Blog

I have my blog because I can't vent to anyone. And I mean ANYONE. The people I want to vent to, of course have to be the source of my problems. Is that right? I don't think it is! Why are my "closest friends" my problem? Maybe my dads right, I should just ditch them. But I don't know how I'd be able to follow through with that. I wish it all wasn't so complicated. And can someone explain to me the definition of a best friend? Because I guess I obviously don't know.