What should I do about my ex who misses me in Army Basic Training, but I have a

[Steph]

new boyfriend? Ok this is going to be long but I need to tell the whole story so that I can get some good advice. My ex boyfriend left for basic training across the country 2 months ago. We were broken up about a month before he left but we were able to be really close friends and still hung out and talked about everything. Before he left for Basic, I started a new relationship with my current boyfriend. Last weekend though, my ex called me from basic, we had been writing letters back and forth talking about whats going on in our lives, but in the phone call he began to express how much he misses me...and not any other girl. Now I am so confused because my feelings for this ex never really went away, but what about my boyfriend I have now? I don't want to break his heart but stringing him along just feels so wrong. I guess the real question is does my ex miss me because he loves me or does he miss me just because being in basic training makes a guy lonely? He told me how his army buddies say hes only happy when hes talking about me or reading/writing my letters, and he has sent me tickets from old dates we went on...any answers from guys who have been to basic already would be so great!