jollybutdepressed,

Vent away and never feel like you're being repetitive. This website is for people to talk about everything in their lives that is bothering them, or at least preventing them from living the life they wish they could have. While the success stories are great on this site, the primary focus of this site is not a to be a place for people to talk about how great their lives are; Rather, it's a support group essentially.
About your Dad helping your cousin, I've often found that to us, it often seems that our parents can treat other people better than their own children. It's definitely not always the truth, but we are very sensitive to our parents' actions. I hope what I'm saying makes sense.

Z