How would you feel?

How would you ladies feel if your fiancé tells you that if you and him ever broke up, you won’t ever find someone else that will love you or anyone like him. That nobody will ever deal with you, they will just use you for sex then throw you away. I mean, I’ve had horrible experiences with guys in the past, and we have talked to each other about our past. But now I regret telling him how these guys made me feel. I told him I felt used for sex before. Never did I think he would use my feelings against me. I feel like he thinks I’m worthless and that he’s a huge blessing to be in my life. I love him with all my heart and I DO feel like he’s a blessing but I’m not sure how to feel about these comments. Thanks.