Is this normal behavior for a guy?

This guy name Alex 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. ((Us hooking up is irrelevant to this post though))

Five months ago when I asked Alex 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 name Billy. And the first time Alex saw me talking to Billy he walked by me saying he liked my scarf. The second time Alex saw me
talking to Billy he walked over to where we were and started talking.

So is this normal behavior? Like basic interaction or was he actually trying to get my attention?
Is this normal behavior for a guy?
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