I've been dating my boyfriend, John, for about 7 months and in the last few months we've been together I've been told by John and his mom that Mark the brother has a very low tolerance of anyone or anything so I didn't think anything of him not being very friendly to me. Then last weekend John's brother Mark makes a comment about not liking me to their sister. As far as I know I haven't done anything to make Mark dislike me and that kind of irriates me just because to my knowledge I've done nothing to deserve him disliking me. My boyfriend says his brother not liking me doesn't bother him. My question is, should I be worried or bothered that the brother doesn't like me?