Can i get some opinion on this situation?

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Can i get some opinion on this situation?
This is an updated situation. Sorry that it is a bit long. However, had to explain in details.

 

I am a 27 year old lady. I am having an ongoing situation.
One of my friend, a married guy (about 43 years of age), and his wife who was good friends with me for few years. Thought of them as parents. They use to talk to me, laugh, and ask me a favor or two. Now suddenly he is not talking to me, only his wife is talking to me. I wonder what did I do to him. He is very close to my best friend who is also quit older than me. But she treats me so good and is very kind to me. He talks to her a lot, but never says anything to me when I am around. He seems very stern and impersonal. I don't get this guy's behavior. Yes I know he ignores me for reasons I don't know. I am friends with him and his wife. And he is acting even more strange with all his sarcastic remarks. Recently, we all attended a seminar. And during the break, he came up to me making witty remark about me taking enough notes for everyone. I know he is being clever because he always criticize people for taking a lot of notes when he thinks they are not paying attention to the speaker. So I was like "no...Only took notes for me", while he was walking always with clever smile, then he doubled back, and said "what was that"...so I repeated my statement...then he walked away.

 

THIS IS NOT A SITUATION AT WORK...I NEVER GAVE ANY SIGNAL OF INTEREST IN HIM EITHER.
IT’S NOT LIKE I AM HANGING AROUND HIM.
WE DONT TALK TO EACH OTHER...AT LEAST, I DONT TALK WITH HIM
FELT LIKE I LOST A FATHER : (

One night, he is trying to talk with me little bit again...but I m ignoring him.. it rained..And I left my umbrella at a meeting location...as i was getting into the vehicle to go home, i remembered i left it inside building...then when i was going for it, he was coming my direction and made statement: " its the fastest i've seen u walk"...i said: "i left something inside"...he said can i go and get it for you?" i said "no..I will get it myself"...then he walked off in shame
i felt proud that time...but now i m feeling little guilty
because i thought he deserved to be hurt. Then a few nights ago, I was talking with someone…I saw him coming towards me from the corner of my eye. I just turned towards the person I was talking to and pretended I did not see him. Then I felt a slight rub of his fingers of my arm. When I turned to look, I saw that he was passing by...i said “oh hi”…he did not respond. Just kept on walking.