<human>: Hey all, I've been dating my boyfriend for about a year. Things are starting to get serious, but I can't find myself truly connecting to him. In my mind, and in the eyes of my friends and family, my BF is a sweetheart who treats me well. I've never had any issue with him regarding other females. But, because I've been cheated on by 3 men in the past (2 of which were high school relationships, but it hurt nonetheless), so it's really hard for me to think he wouldn't cheat on me. i get insecure when he talks to other girls.. i know he wouldn't act on it, though, and he's very open about his friendships and allows me to come along on any occasions if i desire. I especially get insecure when I see insanely hot girls on the Internet and TV because I know it'll be impossible for me to ever live up to them. I just feel that if my SO and I were to get married, he would definitely cheat on me at least once. HOW can I stop thinking this way?? It hurts me so badly, because in my mind I know he never would, but my heart won't believe it.

Condense the text into a few key points
<bot>: Madly insecure about other women in the media and IRL that my BF sees. I know he would never cheat on me, but can't believe it in my heart.