Before taking any step I want you to think about few things.
What you will get when you send you personal images to his fiance? Will he come back to you when he came to know about this?
What all these things will create impression on your daughter?
How we can say this as a true love where he is not ready to take responsibility?
Every person know the nature of their parents. If that boy was really serious about you then he should stand firm with you in front of his parents.
These all things are foolish which that boy is saying that he is ready to take care of you and your daughter entire life. This statement shows that he is trying to fool you.
I suggest you to leave that person immediately. All your extra efforts will bring more pain for you. Think about your daughter first.