Is he right or jealous?

When we went out, I came across an old friend from high school. It was such a nice surprise and he gave me his hand to dance. So, we danced for a long time. While we were doing it, i noticed his hands lowering a tad too close to my butt and that was my cue to stop him. I told him I had a boyfriend and introduced him. Then, we said our goodbyes. My boyfriend was not happy. He said i shouldn't have danced with him and that he wanted me. I don't think i did anything wrong. We danced, that was it and when he started crossing a line I ended it. Why's that a big deal? Maybe he's just jealous
Is he right or jealous?
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