Shit shit shit.
I leaned over to turn off his alarm, he was downstairs, and saw this on his lock screen
Dating support - Dawn really enjoyed your profile
I immediately took a screenshot with my phone. He was a bit odd this morning, I wouldn't be surprised if he suspects that I saw it but I said nothing.
I will confront him tonight, but short of trawling through every dating site looking for him, is there anything I can/should do?