Staying with SO because of child.

Has anyone else done this? My SO do not get a long one bit. We fight all the time and are just two totally different people and want different things. We were on the verge of breaking up before I got pregnant. Then the baby came and things got ten times worse. We both feel terrible cause we don't want to have our son grow up in a split household... And don't want to lose time with him as that would happen since we would move to separate homes. I'm depressed cause  we do not love eachother anymore, we do not go on dates, barely talk, touch.... I know at some point my son will notice these things, but he is only one right now. Anyone been through this. Or anyone have advise?