You said this is your first time with a military man.
Can’t ask me how I’m doing on any great level other than a brief “how are you”… This is the core behaviour of the co-dependent Over-Giver Fallback Girl.
You have time before you need to let your child get to know him.
Women often involve their children too soon in a new relationship and, when it ends, it leaves their children confused and angry.
All of the signals this guy is sending say that you are invested, he is not.
He is occupied elsewhere and to be quite frank, he wouldn’t want you to stay with him out of guilt or pity, something you have both of.
He just got back from Afghanistan and decided that he wants to be married within the next two years.