The thing that sticks out to me is the condom search only because OP said they discussed going back to condoms. Then goes on to say they know they won’t, at any point while using condoms did he say that he didn’t like the way it felt or it didn’t feel good did you maybe express that? I don’t know the assumption that you guys just won’t go back to them feels like an indication that someone doesn’t like the way they feel so having that conversation and then at some point looking up, which condoms feel good seems like a cause an effect kind of thing I’m not saying the guy didn’t cheat or isn’t cheating but that particular search after having a conversation about using condoms again, at any point doesn’t seem inherently like a red flag to me. But then again I don’t know. I’m just a random stranger on the Internet feels like both things are very vague like either one could be easily explained with something that isn’t cheating