Confused on what to do

Me and this guy was suppose to just have a one night stand and here we r 9 months later and it's confusing he tells me we r like a couple shows my family we r together but his family and friends I'm just a roommate we do about everything together we also love together he works nights and I work days so we don't get to see much of each other and idk what to do I feel like I should leave but part of me feels like I should stay and to keep seeing if it will get better he treats me and my daughter really good he treats her like his on but it's the fact he tell his family and friends I'm just a friend and his roommates he has messed with a girl with me living with him and I haven't messed around on him what so ever I've been faithful threw this whatever he wants to call what when r in or whatever we r doing so what should I do