DEAR ABBY: I don’t care for my son’s girlfriend, “Trish,” and he knows it. He seems to date needy women. It may boost his ego, but it doesn’t reflect well on the young lady. Our initial encounter with Trish wasn’t a good one. We found her to be rude and disrespectful. He claims she was “nervous.” It’s common courtesy to acknowledge those in a room when you enter, if they’re the only ones in the room. I don’t know if my son plans to marry Trish, but this isn’t the relationship I assumed I’d have with my son’s wife. I…