I've fallen out of love with my husband

Over the past couple of years I have slowly fallen out of love with my husband, I think it began when my son was born.. We Fight constantly, I can't stand any affection from him, and pretty much everything he does annoys me. I have stuck around because we have a gorgeous 2 year old boy and a little girl due in November.. I know he's not a bad guy and he's a great dad, but I just for some reason cannot stand him?! I'm at my wits end and I have no idea what to do?! I think the problem is mostly me but I don't know how to change the way I think ... 😩