Dear Mr. Dad: My boyfriend and I have been going out for several years and are quite serious. We've even talked about getting married. We both have adult children from previous marriages, but while I'm very close to my daughters, he's been estranged from his 25-year old son for more than 20 years, ever since he moved out. They've recently started communicating again, which I support completely. The problem is that my father died unexpectedly, and the funeral is the same weekend as a trip my boyfriend had planned with his son. I want him to come with me to the funeral, but he says that he can't (won't) cancel the trip. I'm very angry and my family is too. I don't want to end the relationship, but I don't know what to do.