<human>: Give me the gist of the text in a nutshell

I'm having a little internal struggle here. For some backgorund, I'm never a jealous kind of guy. My girlfriend has friends who are guys, and I have friends who are girls. We both don't get jealous and it makes us work great because we both hated dating our exes who were both extremely jealous. Lately there has been a couple guys pursuing her. They know she has a boyfriend but they don't stop, they ask her on dates, try and touch her, etc. She is honest and tells me, and I appreciate that and I trust her, knowing she'd never go behind my back.

Here's where things got weird today. I went to the school pub with a friend for a beer, and I saw her at a table with people from her group in one of her classes, including these guys that keep pursuing her. I noticed she acts towards them in ways she's never acted towards me, ever. Typical flirting actions, leaning in to talk to them, laughing at every joke, smiling big, especially playing with her hair whenever they're talking to her. And that threw me off.

So I don't know how to approach her, because I've never felt jealousy like this. And I know she doesn't like jealous guys. Do I tell her it bugs me and theres no wonder these guys are into her? Do I ask her if she was trying to make me jealous? Any advice from you guys would be appreciated.
<bot>: I don't know how to talk to my girlfriend that it bugs me how she flirts with guys who have been trying to make a move on her, and continue to even though they know she has a boyfriend.