Not really cool lmao

I did, last august.
I had a girlfriend at that time, and I loved her so much that I decided to gather up my courage and tell my mother about my bisexuality. I wanted to love her freely. But I got so scared that I starting crying A LOT, totally unable to talk.
When I started getting a bit better, I told her that I liked girls. I couldn't give her a proper explanation without crying even more.
She asked me why I thought that. She doesn't really remember all my friend's names, but she remembered them ALL while asking me if I was in love with one of them. But she didn't know who my gf was, so I kept saying no, unable to tell her about my gf.
Finally, some days after, she came in my room and asked me if I knew how girls do it... I told her that I didn't even tho I did, but it would've been way too strange...
She explained it to me. Asked me if I felt grossed out. If I really thought I would be able to do those things with another girl.
I couldn't bring myself to tell her. I already knew all of that. It didn't disgust me. But the feeling of shame took over and I didn't tell her about me being disgusted by lesbian sex or not.

I guess she kind of forgot about it. She never asked me about it afterwards, and simply told me that I was still too young to know about these things. That I was just confused.
God knows how much courage it asked me to tell her. But she didn't take me seriously because I wasn't able to answer her personal and very innapropriate questions about girls having sex. I felt a great shame for the following months and couldn't look at her in the eyes.