I'm dealing with this too. I just want to ask why, but the answers given here are helpful. Avoid is the best thing to do with some people, because, for me, I just end up feeling bad about myself in that person's presence. And let it be on them. That's your neighbor's problem. It's only your problem if you let it be. And if that person doesn't like you - oh well, not everybody in life will. That's not a reflection on your character, but on hers - for the bad attitude she shows you. Just continue to be the kind person that you are. It's funny though, sometimes we can get a little insight into another person's life, some how, and then say, "oh, so that's why she acts the way she does," and then sometimes believe it or not it can allow us to empathize with the person. This has happened to me in the past, and I hope it will happen to you.