He acts like he hates me. like i don't exist. he puts all his attention on our other friends. he completely ignores me. I don't usually talk with him. its always awkward when we do. he is married to a great woman. but he behaves so rude and avoid me like the plaque. then why does he try to run his fingers against my skin?

I don't want him. I've tried to make it clear by not allowing him to help me when he use to offer few years ago. The he is acting cold. But his wife is so sweet. Now he gives and likes the attention from others.
Now i notice that whenever any male friend of is talking to him or whomever,and i am there, he looks to see if or how long they are looking at me. I notice this because whenever they are looking at me for any given period without looking anywhere else, he look at me then back at them. then he seems agitated, and his voice goes from normal to sulky. But otherwise, he gets happier and more interested in this other female. He's acting so queer (strange). He acts like he is in a bad mood when it comes to my presence. Then he just snaps out of it when my other friend flirts with him.

two days ago, i said something really stupid in front of him and two other friends of ours. He just smirked and walked off after they walked away. I just heard him laugh in an undertone.I was so embarrassed. I never want to give him any satisfaction from any mistakes on my part. He seems pleased when i am in a bad light. but when i appear smarter about something. He acts sulky and upset, and completely ignores me. He volunteers to take my friend back and forth to her house. He never offers it to me. I think she likes him a lot. I was surprised to find him standing about half inch up behind me when i was facing a wall. He stood there for about 5 mins at a time. back and forth where ever is was, he wold just be right next to me or right up under my neck, just standing there, or sitting somewhere watching me.

Just to be clear - I never gave him the wrong impression. I'm not into married men. and I don't like home-wreckers. But i am curious to know why he goes back and forth with this behavior and he knows I am not paying attention to him. I am a bit worried.