Boyfriend lied.?

Okay, so my boyfriend told me he was a virgin. But the other night we were out with his friends and the topic came up I had said that he was a virgin. Everyone was quite, so we all forgot about it. But yesterday he told me that he was not a virgin and that he had been lyin to me. Tbh it kinda pissed me off and I was really said that he would lie to me. Idk what to do. I guess I always knew he wasn't a virgin. He always knew what to do. But idk. Someone please give me some advice.