What should I do

So basicly sathurday I got extremely drunk and I made out and add oral sex with a guy who has a girlfriend, he told me apparently, but my drunk self didn't process it before it came back in my head while i was sucking his dick... And i then asked him if he add a girlfriend, he said yes and then I fucking left immediatly. Should I tell his girlfriend? I don't know her and honestly it's all my fault because I was probably really pushy, like he probably pushed me away a few times, I honestly think he would not do that normaly as he was really shameful the next morning...