Wedding Plans

Hey guys I am getting married in July and I am so nervous I know that I love him and I want to get married we have been off and on for 7 years and had two of his five kids together and I have them up for adoption, I have seen so many couples fall apart when they are married or always end up treating the other spouse like shit I don't want to lose the love we have for each other and the intimacy, it's not like a normal relationship where you can just break up if it gets to hard to be around the other. I just don't know how to get rid of this feeling :/ and know that it is going to workout maybe I need a night out doing something besides babysitting, maybe it's just cause that s is a lot to process, we aren't having a big wedding invited 19 ppl in total doing it at Princess Island Park just so nervous and so emotional what do I do my fiancé says I'm not ready and people say this is normal.