“Is there something that bothers you about me? You can tell me”
No you can’t. Come on. Even a man doesn’t really want to know what bothers his girlfriend about him. The only way to answer this is with unimportant answers that are also cute like, “When you wake up you look like a smurf” or “You eat all the olives out of my salad.” It’s a harmless “insult” while showing her that you pay attention to her quirks. So, really, it’s a compliment.