He is your Crazy ex boyfriend, after you guys broke up because of The problems you guys had with each other, you guys would always Disagree on things that he likes or he disagrees on what you like but the problem is.. that you guys live with each other... One day you were on the couch on your phone and he comes in and he says

"We used to be crazy in love.... Remember what the things we did.. we would always stick together.. And do crazy things.. like I said we were crazy in love Y/n.."