My roommates and I share a pool of friends, which includes a guy I dated for a brief time. I had just recently broken up with my latest boyfriend when the party occurred. My ex and I are on good friendship terms and he is in a relationship of about 6 months with a new girl.

At the party there was a good amount of what I believed to be harmless flirtation. By the end of the night we were both considerably drunk and snuggled up together on the couch sharing a drink. Then everyone was gone and it was just us. Soon, talking turned to deep discussion which turned to making out. 

That was bad enough, but afterwards he admitted he still has feelings for me, he was upset that I decided to stop seeing him and even asked me if I still had feelings for him. I don't recall what I said but I avoided admitting any feelings for him in my drunken state, though I would be lying if I said there weren't any there, but by that point I realized what had just occurred and what deep shit he was in if his girlfriend found out. 

After his confession he gave me a kiss that wasn't a sloppy, drunken, make-out kiss, but a real, strong, long and purposeful kiss that still lingered the next morning. He held me for a bit (alright, I may have been enjoying this a bit too much) and then I left him on the couch and went to bed. 

The next morning, he remembers nothing. I have tried to catch him lying about his memory loss, but I so far am convinced he really remembers nothing from that night. He seems convicted to stay with his current girlfriend and I'm inclined to just keep the whole thing to myself, but I'm asking you reddit, should I tell him? Would you want to know if you did that?
user
My ex and I
assistant
My roommates and I share a pool of friends, which includes a guy I dated for a brief time. I had just recently broken up with my latest boyfriend when the party occurred. My ex and I are on good friendship terms and he is in a relationship of about 6 months with a new girl.

At the party there was a good amount of what I believed to be harmless flirtation. By the end of the night we were both considerably drunk and snuggled up together on the couch sharing a drink. Then everyone was gone and it was just us. Soon, talking turned to deep discussion which turned to making out. 

That was bad enough, but afterwards he admitted he still has feelings for me, he was upset that I decided to stop seeing him and even asked me if I still had feelings for him. I don't recall what I said but I avoided admitting any feelings for him in my drunken state, though I would be lying if I said there weren't any there, but by that point I realized what had just occurred and what deep shit he was in if his girlfriend found out. 

After his confession he gave me a kiss that wasn't a sloppy, drunken, make-out kiss, but a real, strong, long and purposeful kiss that still lingered the next morning. He held me for a bit (alright, I may have been enjoying this a bit too much) and then I left him on the couch and went to bed. 

The next morning, he remembers nothing. I have tried to catch him lying about his memory loss, but I so far am convinced he really remembers nothing from that night. He seems convicted to stay with his current girlfriend and I'm inclined to just keep the whole thing to myself, but I'm asking you reddit, should I tell him? Would you want to know if you did that?
user
Ex and I had
assistant