AITAH for hooking up with a guy and having an ex-fwb?

I’m a girl and almost all of my friends are either girls or gay guys except for 2 guys who are straight. I literally only have 3 best friends and 2 are girls and one is a guy i’ve known online for a good 2 years (we USED to be fwb) i recently hooked up with my situationship and i wanted to tell my bestfriends and friends about it, so i did. They all took it well and were happy for me since it was my first time, except my only male bestfriend. He started talking about some “no i turned down a girl for you” “no i should’ve been the one fucking you” “i dont wanna hear about your shit” and it highkey pisses me off because friends with benefits AREN’T LOYAL TO EACH OTHER. Nobody was stopping him from hooking up with that girl and he didn’t even wanna talk about her because he thought it would hurt me like wtf????? Over the last few days he was acting weird anyways so i kept asking him if he had feelings for me and he kept saying no. This shit pisses me off so bad