I don’t know how to feel

I was on FaceTime with my boyfriend and he said he was gonna hang up on me so he could talk to his female friend and idk. I’m scared of being cheated on. Terrified. But I don’t want to mention anything because I don’t want to come off as like possessive. And it could just they didn’t want me to hear their conversation like ya know just like a private one but I feel jealous. Maybe cause I’m not allowed to hang out with him and she is. But I feel like he wouldn’t do that. And I can’t say anything to one of my friends cause she is friends with the girl. I hate being jealous it makes me upset with myself

Edit: We ended up talking about it and we’re ok now