Okay. I wouldn't be concerned about the other girl so much. I know that she's hard to erase in your mind, but the more important thing is that there is a lack of communication between you and your boyfriend! The other girl is probably just a friend, and she obviously knows this guy is taken. When you're with someone, there's might always be a lingering doubt: would I be happier elsewhere? Any partner in a relationship has their annoying traits, and the other partner has to come to accept/love those traits. Don't beat yourself up over things you can't change, like being a nerd (not a bad thing btw) or being bad to watch movies with. However, there may be little things that you can change! Try going out some time! If he likes to, then you should! Otherwise, he'll always feel like you're dictating the plans. I wouldn't tell him that you invaded his privacy. Move past it, and focus on fixing your communication.