He had a girlfriend 🤦🏽‍♀️

This guy I knew for a while we spoke but we both would always get into a relationship.. Im single now and i thought he was too because I didn’t see any pictures on his social media or anything no sign of a girlfriend.. so I asked him just to be 100% sure he was single. He swore up and down that he was single. He even swore on his dead mother that he was single. So I’m like okkkkk whatever. I still felt uneasy but there was literally no sign of a relationship! On his page or the ex girlfriend. Nobody calling or texting him while we together like NOTHING! We planned to go away in mid January and everything. We had sex 🤦🏽‍♀️ for the first time this week... and out of nowhere his ex (while I guess gf) posted a video of them together.... like wow ok. I haven’t said anything to him about it. I don’t plan on it neither. But I feel so dumb and mad I didn’t listen to my intuition. 🤦🏽‍♀️ should I block him and just leave it alone?

Btw he hit me up first.