How to rebuild a relationship with my mom

I'm an only child and my mother and I used to be as close as sisters until I came out 5 years ago. She told me that it was just a phase and our relationship immediately became strained. Things are fine unless I allude to my sexuality. I tried to have a deep conversation with her a year after I came out, but that just ended with her ordering me to not tell anyone else that I was bisexual.

I recently got my first kiss (with a girl). I always I imagined, since I was little, that she would be the first person I would tell that to, but if I mention anything related to LGBT topics she starts yelling at me that I'll be dead to her if I do anything "with them".

On the other hand, my dad believes gays aren't "real" and that if they pray hard enough they'll be straight.

I wish there was a way I could have a strong relationship with my mom without sacrificing who I am and living in a free way.