Something doesn't feel right between my fiancé and I. I've tried to talk to him about it, but then he gets defensive and thinks I'm accusing him of cheating. Last night when we had sex, it seems like he had to force it to happen and just wasn't being how he normally is during sex. I'm so lost for words. He's not one to talk about his feelings, but it seems like our relationship is really hurting. I know I'm hurting.