AITA for dating my crush after I knew my friend liked him?

Me (16 F) and my bf (15 M) have been together for a year and 4ish months. We are in freshman year rn. For context this story involves 2 of my friends we will call them Friend A and Friend B. Friend A and i have been friends since 4th grade. We tell each other everything, so it was no surprise to me when in 6th grade she told me she liked boy lets call him B (my now bf). She is very judgmental so i have never told her stuff like that. I also liked B but didnt tell her. Soon after we became a trio. Through the next 2 years she would contently drop hints that she liked him but..yk middle school boys are oblivious. In 8th grade Friend B comes in we ended up getting really close and one day at lunch i was doing the whole "if i say their name will you say yes or no?" I guessed B as a joke...and she said "yeah.he is so cute." Without thinking i said "I know right." We bonded over this and we didnt tell anyone else about it. That was until the valintines dance at our school was coming up...Friend A told Friend B and I that she was going after B. So that night i told Friend A that i also liked him and so did Friend B (with Friend B's permission). In turn Friend A told me that i was just lying and that she cant have anything for herself and called me a "copycat b****". Then within an hour everyone knew and she said and i quote " Im gonna tell him that you like him then that friendship goes down the drain you already know that he doesnt like you and now you are trying to take him away from me". So i was upset obvi...so i called B...and told him i liked him....and Friend B (with her permission) i told him that she liked him too. (he had already guessed Friend A liked him). HERE IS THE KICKER!! B texted FRIEND A and asked "Should i take R(me) or Friend B?" So she sent him a voice note....of her sobbing and genuinely begging him not to take me. Well in the end he asked me and at the dance and while there he asked me out. We are still dating, Me and Friend B are still close, but Friend A is still a jealous and talks crap about B and I all the time. So AITA for dating my crush after i knew my friend liked him?