Am I wrong????

So a while back I had seen messages in my bfs phone to his best friend about a girl at work “wanting his dick” & him saying her ass is fat & what not. It was while we were unofficial so I moved on from it & let it go. Well he had a Christmas party for work today & last night out of curiosity & conversation I asked who he got & he said he got his doctor he works with. Well today after his party I had asked again after he told me how the dinner was & he admitted he lied & got the coworker. So automatically I was pissed bc he lied. It makes the situation look shady by lying but he seems to think I’m being dramatic & getting mad over something so small. But to me, a lie is a lie & regardless of if he would get mad or not about something I told him, I still wouldn’t lie bc I simply just feel like that’s shady. So am I being crazy or am I right? I need opinions