My daughter's first year at college, she spent coming home every weekend to be with her boyfriend. This 2 year relationship ended at the end of freshman year (should have ended way before this). Now she is a sophomore and spending all of her time at school. She seems very happy, has tough classes but enjoys them and has lots of friends. She has not been in another relationship since then. She has always cared very much about her appearance, and has always been very fit. Since sophomore year started though she has put on a great deal of weight. I saw it happening each time I saw her all through the semester but did not say anything as it is a sensitive issue. When she was home for the semester break she talked to me about it and how incredibly upset she was about how much she had gained. She really wanted to change that. Over break she was very careful in her diet and worked out regularly. But now that she is back at school she reversed the weight she had lost over break. I don't feel like I should bring it up unless she does as she would get super upset.Otherwise she seems very happy. What should I do? Should I just let her figure it out and stop worrying about it?