I'm a bit surprised that a 13 year old girl would be this enthused about going on a cruise. But I see no reason at all why your daughter and you shouldn't do this together. Not going wouldn't help your boyfriend's business. He is being too controlling.

Until such time as all 5 of you live together in one home, if that time does ever come, you are two separate families. Right now you have a bigger responsibility to your daughter than to this boyfriend. It sounds like she needs some one on one time with you.

This business that he is building is really nothing to do with you, until you and this man are married. Is there some reason why, after 5 years, you two are still living separately?