Engaged man...

So I'm in class right now and there's a guy in here who is engaged but seems to flirt with me quite a bit. He tells me that my jeans look good on me and told me today that I'm cute (written in a note... As if we're in middle school, it's college). He's in his late 20s. And he's always talking about other girls that are so hot and stuff... What do you think of this? Am I the only one who doesn't think it's right? Might not be cheating exactly (to some people anyway), but his girlfriend probably wouldn't be too pleased I don't think. I feel so awkward haha I hope no one asks what he was just saying to me, being that people tend to blame girls for what guys say for some reason. Idk, I just find it very disrespectful.