Was this guy trying to get my attention? If so why?

This guy has a girlfriend a couple of years ago he and I did actually sleep together once while he's been in the relationship. And he would have done it again had I allowed it. five months ago when I asked if I could massage him. (I wasn't implying anything sexual I've actually gone to school for Massage Therapy) He told me he would love to but that he doesn't think it's a good idea. And that he's trying to be a good boy. I guess saying he doesn't want to cheat. So I started talking to another guy and when he saw me talking to the other guy. He was trying to get my attention. When he saw me talking to the other guy the first time. He walked by us saying he liked my scarf. The second time he saw us talking he walked over to where we were and started talking.

I don't get why he was trying to be in my business when he has a girlfriend.
Was this guy trying to get my attention? If so why?
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