Sex dream

I'm in a committed 2 year hetero relationship with 3 kids (another story) and a few months ago we (my husband and I) had a 3some with a girl. Since then I've been less attracted to men and keep having dreams about my ex girlfriend from high school that I never had sex with. I keep checking out girls and girls really turn me on. I really don't enjoy sex with my husband and I try to avoid it. It wasn't like that before and I'm so confused about what's going on. I thought I was bi with a male preference but maybe no? I don't want to leave my husband, I do love him so so much