So last night my boyfriend and I were laying in bed and I was looking at him as he was talking to me. I was watching him clear all of his open apps on his iPhone and saw a conversation he was having with a pretty blonde girl on Instagram. I didn't recognize her, so I ended up asking who she was and he said just a friend and brushed it off. I decided to look at his Instagram and find out who she was. Her profile was blocked, so all I could tell was that she was young, pretty, blonde, and probably single singe she was the only one in her profile picture. I started to get really mad, so I grabbed my stuff to go sleep out on the couch. My boyfriend kept asking me what was wrong and of course with my being stubborn as I am, kept saying nothing and ended up sleeping on the couch. He tried to get me to read the conversation, but I refused. The tension ended up carrying over to this morning while I was getting ready for work. He tried talking to me and said he doesn't like it when I am mad because I just completely ignore him since that is usually what he does to me when he is mad. So I decided to speak and ask him if he understood why I was mad. Here I am, 8 months pregnant, not feeling very sexy or good about myself anymore, and to find out that my boyfriend was talking to someone , younger, thinner, and prettier doesn't make me feel very good about myself. Not to mention, when my boyfriend was married to his ex wife, he had a girl he went to high school with add him as friends on Facebook. They started talking every once in a while and it was all innocent at first because she was also married and had 5 children of her own, so they would talk about her kids and his kids a lot. Then it stopped being innocent when she started making inappropriate comments and would ask him how her ass looked in certain clothes. Eventually his ex wife found out and it definitely blew up into a huge fight and this woman was threatening to beat up my boyfriends ex wife. So after knowing that he allowed for that to happen, and after all of my bad past relationships where I have been cheated on, I am afraid it is going to happen again and we haven't spoken since I left the house for work. It's not fair for me to say that he can't have girls that are friends or talk to them, even if they just so happen to be pretty and single. I just get a bad feeling and feel like there are no good intentions there when a single attractive girl and an attractive guy that is in a committed relationship start messaging each other. Or am I overreacting?