Bestfriend and boyfriend just cheated on me.

i havent been in this sub for years. I have had a boyfriend since middleschool, and a bestfriend since elementary school. I have had these people by my side. aslong as I had those two I didnt consider myself lonely. Yesterday my boyfriend gave me a “promise” ring, while he was showing me the texts between him and my bestfriend talking about the ring I accidentally scrolled too high and saw a conversation about them hiding a scenario where I ALMOST caught them Cheating. and then she sends heart and kissing emojis to him. right when he saw me coming close to those messages he grabbed his phone and hid it. Once I found it he got extremely irritated with me going as far to fight me for it, I just gave it back.

I want to be mad at them, but all I have is them. I have nobody if they’re gone, it’s been years and years of just them