I think it's about how the girlfriend has suspicions about her guy cheating on her & when she questions him, he doesn't deny it nor does he agree with her (he doesn't want to talk about it; he says it feels so good just to be with you & you gotta learn to have faith sometimes).
One day, the girl catches him & she starts realizing what she should have done or said to him so that he'll only be interested in her, but then she also realizes that it's not her fault so she leaves the guy. After she leaves, the guy then realizes just how much the girl means to him (the truth hits you the hardest).
I think it's about how the girlfriend has suspicions about her guy cheating on her & when she questions him, he doesn't deny it nor does he agree with her (he doesn't want to talk about it; he says it feels so good just to be with you & you gotta learn to have faith sometimes). One day, the girl catches him & she starts realizing what she should have done or said to him so that he'll only be interested in her, but then she also realizes that it's not her fault so she leaves the guy. After she leaves, the guy then realizes just how much the girl means to him (the truth hits you the hardest).