@maybey,
1. You have not "met" him, you've been texting and telephoning each other for four weeks. According to you, you have yet had a face to face meet. For all you know, he has foul body odor and farts constantly.
2. You can't get consistent info from him about his relationship history. Is he a liar or a male slut? Can you trust the validity of anything he tells you about anything? Either way, is this someone you want to have a relationship with? If so, why?
3. He paid a little bit of interest to you the first couple of weeks with text messages and Skype. Now that he knows you won't be available for a meet up for two more months, he is slacking off with the attention he gives you. Ask yourself why you need so much attention from him? Does he show an interest in what you are doing or is it always all about him?
My advice is to wait out the two months you will be away and see if he keeps up the courting by texting, etc. See how many different stories he tells you in that time. By then, you should have a pretty good feeling about how things are going and can then decide if you want to pursue things further by setting up a date (in a public place) where you can finally meet each other for the first time.