9 “Triggers” That Can Make a Guy Suspect an Affair, Even If It’s Groundless

8. She talks about a film they didn’t see together.

“I just like going to see films by myself.” If you talk about a film or exhibition your boyfriend doesn’t know about, he may suspect you’ve been on a date with someone else. To prevent trouble, no matter what film it is, it might be a good idea to invite him first.