I want to try he doesnt?

Hello! So I am currently on the IUD and have been since 2013 it has worked great! But now our youngest is going to be turning 3 in April 2016 and I'm starting to get baby fever. We have two boys 7 & 2 and I want to try for a girl so bad! But my boyfriend doesn't want another one. It sucks so bad because I have saved all my girly stuff since I was child in hopes to one day get married and have a daughter. Now I feel like I wasted my time and its never going to happen.