You can deal with it by talking with her about it and keeping an open mind.
Look, every attractive woman around gets ridiculous amounts of attention every single day. It’s so bad that it’s very possible that the amount of mental effort she puts into filtering all that attention dwarfs anything you’ve ever done in your entire life.
You think it would be amazing if you had women all trying to get in your pants all the time. But you’d only like it for the first few days or so. After awhile it gets annoying and so you have to figure out how to be by yourself.
The thing you have to understand here is that the social expectations are different for guys than they are for girls. If girls aren’t nice and accommodating of male attention and interest, even if they don’t return the interest, then guys will very often cause a scene and ruin her night.
So they learn to pretend to flirt back. As a guy looking to date attractive women, if you can’t learn to deal with this then you’ll do what every other guys does that can’t handle it, you’ll start trying to control her. Who were you talking to, why were you talking to them? Let me see your phone.
Once this starts it’s only a matter of time before the limits of your decency are tested. Most attractive women in the US have been physically abused by a partner.
If you can rein in your jealousy and work to see this game for what it is, then you can enjoy a wonderful relationship with a girl that hits on all cylinders.
When you talk to her about it, try to do it without judgment and with the attitude that you’re trying to understand something that you don’t have to deal with yourself. You don’t have to deal with idiots trying to mess with you every day, so don’t try to pretend you know what it’s like.