Bit of a backstory - bf and I have been together 5 years. He cheated on me a couple of years ago with a girl who he'd sworn was "just a friend". We made it through on the proviso that he would never see her again. Fast forward to a few months ago and I found out he was still hanging out with her. I naturally blew my top and made him block her from everything.
I'm now getting the same feeling that I did before (and was always right) but I don't know if it's my paranoia because he's done it before, or if he is actually doing it. He's getting pissed off at me because he thinks I shouldn't keep bringing it up, but my point is that he's lied about it countless times before, so why should I believe him now?
AIBU?