The way you feel is totally understandable. If it were me, I would just let him be the 'fun dad' he wants to be, taking her to movies. I know it's hard to have to be the 'heavy' parent, and it's not fair, but I think your daughter will see it for what it really is and respect and admire you. I'd tell her "it kills me that I don't have the money to be able to have more fun with you, but I am glad that at least you are getting to enjoy things because your father wants to do those things with you". You can still do plenty of special things with her that don't cost money.