I'm 23, and my boyfriend of 3 years has just spent two nights in a London hotel with a woman he says is just a friend. They were going to a big concert together, and she's 44. I don't like this, and I didn't know about it until now. He says it was just to save money. The woman has been married for 20 years, but I don't know what her husband thinks, or if he even knows or cares, but AIBU to wonder if my boyfriend really thinks anything of me? I should add that they shared a twin-bedded room.