My 15mth old daughter has two to three breastfe...

My 15mth old daughter has two to three breastfeeds a day. She has one before each sleep to settle her down before going to sleep. I want to stop feeding her but she won't take to milk. She water drinks from a straw cup but as soon as I put milk in it she won't even touch it. She screams when a bottle is put anywhere near her. Has anyone got any ideas on how to go about this, I feel like I will be feeding her forever!!