I don't know what to do? ?

I think the problem is between her and her dad. I don't think it's you or that you will make her feel better by talking to her. I was in her shoes so I know how she feels. Encourage your boyfriend to take her out for a daddy/daughter date at least once a month. Tell him what she needs (shoes, new tops, jeans) and that he should take her to the Mall. She just needs to feel close to her Dad.