I've had the same problem. The old big clothes feel comfortable and I sometimes wear them around the house. I'm still wearing all my old nightgowns, even though they are huge on me (I am down four sizes). I like feeling how big they are. However, I have noticed that when I wear new clothes in the correct size, I get lots of comments about my weight loss. Other people don't see if as much when you are swimming in your clothes -- when you wear something that fits it is quite noticeable this is motivating. My husband keeps pushing me to get more smaller clothes and that does help -- perhaps your girlfriend can do the same thing for you. I also need to look "professional" for work, so that forces me to buy things that fit.