Advice/help needed?

I will keep this as short as possible. I went on holiday to my parents birthplace in 2010. Upon my return to the UK, a 'family friends' son added me on fb, we never spoke much when I was there. We spoke every now and then on fb, staying up all night. As the months went by things got a little serious for him and he confessed his feelings around the end of 2011. Being the stubborn person I was, I ended all contact. However over the 3 months we didn't speak, my world had become completely hazed and all I could think about was him. I contacted him and confessed my feelings, it took a few days before everything was normal again and we were talking like the 'break' had never happened. October 2012 he ended everything we had, every conversation would end in a argument and one of us would end up going to bed hurt. I was off to Uni and he had no plan about his future, I tried everything in my power to get him to change his mind and that we could work things out but he stuck firm to his decision...I would email him every now and then (the reply to a 6 page essay would be 'alright, leave me alone') being the clingy person I am until the end of November when I stopped trying and gave up but my feelings only became stronger. 20th April 2013, he emailed me asking me that he was finally ready to explain why he had suddenly gave up on us. I love this person so obviously I was over the moon that we were talking again. On the 2nd night he was saying that he missed me a lot and that he loved me etc. but I didn't say the same back (playing hard to get? Big mistake.) and even though since then I've said those three words 4 times since that night, he just completely ignores it and changes the subject. I found out that he had been recruited for the army 2 days ago and I really understand how hard and stressful things are for him but every night I go to bed in tears, he's changed so much and I try to communicate but he just says 'stop picking fights, I cba with this, I'm going, night.' Its been the same for the past 3/4 nights. Last night I asked him this. Me: Do you even have any feelings for me anymore? After 45 mins he responds: why do you ask such a stupid question? After a while I asked him whether he wanted a break? To sort things out because I understood how hard things are for him. And he says: is this really about me or you? So I obviously try and explain that it's about him and so he can sort his head out. His response: do what you like, I can't be bothered with you or this anymore, night. What's going on? Even if I ask a simple question it backfires and he says that I'm always trying to argue with him. Should I just leave him for a while and if so for how long?....I know that tonight around 8pm he will come back online and ask how I am and stuff like nothing has happened then around 9...another argument and he will just go? I'm so lost, please help?

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