I feel for ya about the whole girl thing. There was a girl I liked for three years but was too much of a pussy to ask her out. I did on the third year though end up getting he a valentine's gift. But I was too late. She ended up getting another guy. And then at the end of the school year she moved across the country. About the at home thing you should really try to get everyone in your immediate family together to talk to your sister about her staying at home and taking advantage of your dad. Not much else advice I can give but I hope what I've said helps.