Why did my gay friend kiss me on my shoulder and touch my thigh? He also has said I am his little sister that he will always be there for me?

He has hugged me and kissed my forehead and check. He was saying to his friends "Karishma is different, she is a virgin in relation to "alcohol."
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I am 90% sure. He has a boyfriend.
Why did my gay friend kiss me on my shoulder and touch my thigh? He also has said I am his little sister that he will always be there for me?
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