How to fix a relationship?

I have been with my boyfriend/baby daddy for 12 years and the first two year was great and then we had kids and now our relationship is not ok. We don’t have communication and we don’t have any conversation if I start up a conversation with him he will shut it down fast but he can have a great conversation with his friends and family and that hurt my feeling and another thing we don’t show our love for one other anymore we don’t kiss or hug anymore. And there is more I don’t know what to do please help me