I have dreams of being with women but I have a bf I love

I feel absolutely terrible about this. I love my bf and he’s amazing but I have dreams of being with other women.. in some of my dreams I cheated on him with a woman. I feel torn over this. I am straight but have been questioning bisexuality for the last few years. I haven’t told my bf this. These dreams feel so real that when I wake up I question my entire reality. Sometimes I do fantasize about being with a woman but I do not want to leave my bf and I certainly am not going to cheat on him or suggest an open relationship.