Breakup to makeup

Recently me and my children’s father separated over really petty none sense. We have 1 son and another on the way . There’s nobody on the planet I could imagine spending my life with and definitely nobody else I want my children to experience as a father . We BOTH know that we only want each other but when we have disagreements we seem to forget that . We’ve been together for years and had a lot of ups and down , good and bad ..lost a child and so much more and somehow we seemed to overcome it all . My question is what are some steps in the right directions to making up a unbreakable unit that we both can be happy with and understanding of each others feelings and needs and wants .