I think it's normal for you to be confused. Most people (probably actually all people) are not 100% gay or straight and sexuality is really quite fluid. I don't like that we put such labels on it, but humans like labels so we have this predicament.

Just from what you said, it definitely does sound like you are both attracted romantically and sexuality to women. I am not attracted to women in either way, but I also struggle with looking for replacement mother figures. However, when I identify someone as a "'mother figure", my fantasies about her are solely wanting to be adopted and cared for like a literal mother/daughter. I have never had any desire to kiss them, or be held by them, or do anything even remotely intimate.

I think that being attracted to almost exclusively straight women is a different issue entirely. It's like you're setting yourself up for failure because it will never work in your favor. I know that I am personally more comfortable around gay men because the idea of mutual sexual tension freaks me out. I also don't have a good relationship with my dad and I'm scared of being rejected by men so I mostly associate with gay men.

I don't know if hearing the perspective of someone who has only experienced the mother figure part of this is at all helpful. I'm sorry you're going through this