I really need help with this, help?

I have a boyfriend im 15 he's 16 turning 17 in 6 days, i've known him for 11 months but we just started dating a month ago, i've always liked him but he travels for a national lax team & is always gone but we skype at night for a hour each day maybe more sometimes but before me he had a girlfriend for 3 years & he said he never loved her cause she was a ***** but he still talks to her & i think that because he travels he might still skype with her when im not on or tells me he's doing something else & i dont know what to do advice?