DP and I have been together nearly five years and in that time I've never had the slightest reason to think he's been anything other than completely faithful to me. I trust him more than anyone I've ever been with. Our relationship is generally very good. I know all of his friends, he's incredibly open and transparent about everything and never hides his phone or behaves in a shady way.
He went out on Friday night without me for a reunion of a number of old friends, some of whom he hasn't seen for years.
He came over last night and, in the course of talking about the evening he told me one particular woman in the club he was in was very rude to him because she had got the impression he was trying to pick her up. I pressed him on this because I thought it sounded odd and I wanted to know what he'd done. He claimed not to be able to remember either what he did to merit the reaction (and he was by his own admission quite drunk) or what her reaction was, just that she was "very rude".
I find the whole thing fairly bizarre: it almost felt like he was trying to give me a sanitised version of what happened upfront in case someone else told me what he'd done first and I found it very strange that he had volunteered this information to me. On the other hand there were several people there who I know pretty well and if he had really embarrassed himself or made a blatant pass at someone I feel fairly sure someone will tell me and no one has. It's very unlike DP to do anything like this: he's absolutely not the sort of bloke who would usually try to pick up women in a bar or club (even when single). So it would be out of character for him to chat someone up, even if he wasn't with me.
I'm strangely unsettled by this in a way I can't quite put my finger on and feel inexplicably like I can't trust him, suddenly, for the first time ever. But I may be completely over-reacting. Should I call time on the relationship? Should I probe further or ask one of his friends? Or am I just overthinking?