If you want a cyber, fantasy relationship that takes up your time/energy/life, then continue with this.
BUT - you must know, there is NO serious relationship here that has any possibility of growing into something else, AND you have no right to think you are exclusive to each other, AND you need to be ready and willing to see him with other "real, live, living girls."
Of course he wants to talk! Guys like having a lot of girls on the string. It makes them feel needed and wanted. You are not the only one, you know that too, OK?