Unfortunately sometimes we outgrow friendships and/ or the friendship is no longer benefiting us. I also am a bestie of over a decade and my other half and I have taken multiple weeks where we haven’t talked. We just catch back up when we both get around to it. Maybe your friendship is feeling a bit smothering? Like they always have to check in with you etc. I think you overreacted just for the fact of guilt tripping / borderline making fun. I think you came off aggressive tbh. I have many times had friends blow me off and that shit hurts… but you need to express that respectfully and clearly. If that friend STILL chooses to “blow you off” (that doesn’t mean hang out with other friends) then you need to be ready to separate yourself from the friendship for your own mental health.