Next step

I love my boyfriend and we are so good together but his family sucks. They feel they can be mean to me but as long as they talk to him is all good. He wants to get married but I am worried. His mom and sister blocked me and his dad doesn’t like me. The reason is he is white and I am Latina. That is it. I don’t know what to do. I am 29 and he is 44. We both don’t have kids but I want kids and he does too. His family won’t seem to come around and I feel he is stuck in the middle and feel bad. What should I do?