Is he interested or Not..

I need help Ladies.. so I been Dating this Amazing older guy, he has a teen son which he shares 50/50 with his ex Wife. They live apart. We have seen each other every 3 weeks. Here is what I don’t get. I’ve asked him if we will see each other this weekend and his answer was I DONT KNOW WHAT MY SON IS DOING, HE IS WITH ME UNTIL NEXT MONDAY, which is when his ex will get him. We haven’t seen each other for 2 WEEKS NOW. I told him how do you think this is going to work out? Is seems to me like you take FULLY RESPONSIBILITY FOR YOUR SON, which is ok. But doesn’t your son have a MOM THAT CAN TAKE OVER, when you have Plans with Someone you are dating’ that’s what I told him. LADIES am I wrong for telling him that??? Also is he interested in me? When he is not even making an effort to see me? I don’t have Kids so Maybe I don’t understand his Case Lol.. please help me out. WHAT SHOULD I DO??? 😳😏🤔