I have a similar problem with my uncle who lives with us. We hate each others' guts to be honest... So what I do is I just leave the house to be with friends or with other family members that don't treat me like absolute ****. If I were you I would try to make time to be with other people because trust me, me being around the person I hated caused some pretty crazy conflicts. Get the hell outa dodge when you can!

And also welcome to the pc forums, hope you find your time here of use, and remember there are people including me that you can talk with if you need it. Otherwise I hope things work out well for you.