Emotional cheating?

What’s your guys in put, been dating a guy for two years, things have been rocky, we got drunk last night, and he was texting so I asked to see. Mind you I have never gone thru his phone and so he lets me see so I see multiple girls messaging him and one I opened the conversation and he was asking her to come over and “goodnight 😘”, so I confronted him about it and he said I wasn’t emotionally there for him? Wtf does that even mean! He said it’s a coworker he used to work w. But that he’s never been unfaithful to me. All he does is text? Honestly, I can’t even put into words what’s going on in my mind or how I’m feeling 😔