DEAR ABBY: My boyfriend and I were excited to go on an $11,000 Caribbean cruise. His 22-year-old son was not that enthusiastic. We invited him to join us for dinner, shows or to play games, but the majority of the time he refused. The only time he’d join us was for events that were paid for in advance.

He called his mom, grandmother and girlfriend every night, but not once did he call his father’s mother. To me, it seems like he’s not interested in his father, grandma or me. The moment we arrived home from vacation, he bolted out the door to meet his girlfriend and slept at his mom’s house. What can I do to bring this family together? — SOCIAL DISASTER

DEAR SOCIAL DISASTER: Although at 22 your boyfriend’s son is legally an adult, he didn’t act like one on that trip. In fact, he demonstrated that he was uninterested and didn’t want to interact with his father or with you. It is nice of you to want to bring him and his dad closer, but it’s time for you to step back and let them work it out. Nothing you can do will fix this.

Read more Dear Abby and other advice columns.

Dear Abby is written by Abigail Van Buren, also known as Jeanne Phillips, and was founded by her mother, Pauline Phillips. Contact Dear Abby at www.DearAbby.com or P.O. Box 69440, Los Angeles, CA 90069.