Men, the social media of girl I'm dating making me uncomfortable - how would you handle this?

I'm dating a girl/woman for 3 months now (both age 27) and we've had some really nice dates and I truly like her. We're not in a relationship but we're in the phase that we both aren't ruling it out.

Personally, besides Reddit I don't use social media anymore. I've used instagram, snapchat and facebook a long time but am off those for long time now and never was really active. She uses social media which I, of course, have no problem with.

But yesterday a friend of mine looked her up on instagram and showed me her page. I didn't see this until yesterday. She constantly posts a lot of bikini/showing pictures of herself, and very often as well. I don't judge anyone who does that, she can do whatever she want - but I have a bad experience with an ex-girlfriend of mine who did the same and eventually cheated. So I would say it's definitely not really my thing.

She never mentioned me this nor was this necessary since we're not in a relationship, but it makes me crazy uncomfortable and I can't lie that I look a bit different at the whole dating thing now.

How would you guys deal with this?