Annoying ex

My ex boyfriend who played a father role to my daughter while we were together expects me to flat out just give my daughter to him for hours by himself. She is not weaned from my breast & will rarely take her bottle. His solution to that is that I should just magically give her the bottle and wean her like yesterday. She is not ready & I'm not that cruel. I am also quite scared that since he is on her birth cert. He might just try to keep her from me. Anybody else deal with issues like this? So stressful. 😥