I agree, maybe he can buy her things that you can not afford but nothing will ever replace the mother daughter bond you have spent 11 years creating. Girls need thier moms especially when they start hitting the 12 and 13 year old stages. I would say spend what ever time you can with her, and stay tuned in on her intrests. My 3 year old recently started visiting her dad. Part of the agrement was his mother had to stay with them, the entire time she is at their house she has no rules. No bed time, eating what ever she wants, watching TV when ever and never lifting a finger when it is time to pick up. We have very different rules for her at my boyfriend and I's house. The first time she came back she cried every time I expected her to follow a rule. It broke my heart at first, but soon she realized that with rules she feels more stable. Co parenting with an Ex can be hard but it sounds as if he cares for your daughter and that is a privledge not all single mothers have. Good Luck.