What do you guys do?

So my husband and I have been trying to have a baby. It has literally become the only thing I think about. My husband after a year and a half has decided he really doesn't want any kids. We are 26 and I know we are young but I've been wanting to be a mother for a very long time and he knows it. I have been with my husband for 6 years already. I'm not sure if I should wait or if I should fight harder for this. I can't force the man to have a baby when he really doesn't want it. I don't know what to do.