How do I get my boyfriends (Mark's) brother off my mind? It seems like any little thing will remind me of h?

If Shaun is causing you so much grief, he's the one you need to get out of your life. Of course, he's family, so that's easier said than done, but who says you have to be around him at all? Do you have to be there every time your boyfriend decides to visit him? No, you don't! He's obviously totally disrespectful toward you, so he should not be given the privilege of being in your company. You have no obligations toward this person just because he is family. You're not obligated to your boyfriend to go through that kind of treatment from his brother just because they're brothers, either. Once you exclude him, and know in your heart that you do not have to include him into your own life, you'll feel a whole lot better. He's not only weird... he's a jerk! I'm sure he's offended plenty of other people with his behavior and he probably doesn't have any real friends. You don't need that kind of person mucking things up in your own life and worrying you so. Just tell your boyfriend that as much as you love him, you refuse to tolerate or be subjected to his brothers foul treatment. And then let him know that you have no intention of getting in the way of their relationship... after all, they are brothers. I'm sure he'll understand and be willing to work through this with you so that all works out just fine for everyone involved. You definitely have to come first in this, though, because you are the only one who is being hurt by it. Stick to your guns!!!