Fiancé cheating on me in my dreams

Kail • I`m 24 and a nursing student. I got married on October 8, 2015. I have PCOS.
So I had another dream last night (the third this week) that my fiancé cheated on me. It's the second dream where the girl has been the same. 
He never dated this girl, but she was his friend before before he and I got together. One night we had a big fight about her, because I was emotional and drunk and I asked if he had slept with her. He never answered me.
I know I should let the past remain the past, but I don't care for the girl (her attitude just clashes with mine) and she's snobby, but thinks it's cute to act that way? I really don't see what my fiancé saw in her. 
I want to bring it up to him that this is the second dream I've had about her and him. But I probably shouldn't. Idk. 
I guess I just wanted to get all my frustrations out! Lol