<human>: I have been in a off and on relationship with guy who does this. He started this behavior when we were on a FWB break. We aren't in a established relationship and so it makes it confusing for me.

He gets all weird and worried that I would cheat on him when I mention my friends who are guys that i have known since I was growing up. From what I know he always had guy friends.

When we semi got back together? he started talking to random girls on Okcupid and other dating websites like POF. He told me it was because he wanted to make new friends on there and I didn't think much of it.
It started bothering me when he would do it all the time. He would get all secretive about it and would do it when we were on dates, hanged out etc. It really bothered me because I caught him on one of them flirting with this other girl. It broke my heart and again he kept reassuring me they were just friends.

I don't mind guys I am dating to have friends that are girls but it seems like I have always have been hurt by guys crossing that line.

Provide a brief overview of the text.
<bot>: Men is it cheating when you text random girls or other social media sites? and Can men really just be friends with girls while dating another women without crossing those lines?