Why do my guy friend gets so weird when I try to touch him?

I am not a really touchy person unless I have known you a long time. My guy friend and I have known each other for over 10 years. But everytime I try to hug or touch him he says he has boundaries. However I have seen him give hugs to other friends. I don’t smell or anything. And we sometimes play fight which is the only time he will touch me because I’m ticklish. We talk everyday on the phone and we live next door to each other. He use to call me sister but now he calls me by my name. And he constantly teases me now.

Why do my guy friend gets so weird when I try to touch him?
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