Anonymous has been with his partner, on and off, for about a year and a half now. They broke up twice in their relationship mostly because he used to go out a lot and also cheated on her. 

They are now back together but he suspects that she might be in a relationship with the guy she was having a thing with before they got back together. 

He doesn’t have any concrete evidence of this but says she tends to be evasive about her whereabouts and has done some things that make anonymous question her commitment.