Can you help me work through my confusion?

hello dear community, i have a problem. I am 17 years old aand I don’t really know if I am bi or not. It has been 3 weeks now and I am talking to a girl online. She is pretty, kind and caring. So we have this (taboo) relationship. We already have talked about meeting and about future but you know she lives far away. like 283394 km away i guess…I don’t know if I also like girls or just love the attention they give me. That sounds stupid i know but hear me out. i’ve never had a great, long-lasting friendship with a girl so i thought maybe that is also possible?

To be honest, I also don’t feel something deep in my heart, but I also dream of me being in a relationship with a girl. I had few crushes on a girl and whenever they were around me, my heart would panic. Did I describe it correctly? It is my first time writing about these stuff and I am not good with explanation sorry.

The other problem is my mom. I tried to get her opinion about me being gay and she definitely wasn’t okay with that.

She has lesbian friends and she isn’t homophic but when it comes to me she says I WILL be a big dissappointment to her and also she will cut me out of her life…so what am I gonna do?

i am not sure if i am bi and okay lets say i am…BUT what about my mom?? i don’t know what to do(┬┬﹏┬┬)