<human>: Can you condense the text into a few key points?

I've been seeing this guy I met in class for two months now, and I can say that I've never been this optimistic about dating someone.  We hit it off right away, and I have definitely developed some strong feelings for him, which is probably why this insignificant problem is bothering me so much.  For some context, we go on dates atleast once a week and things have gotten physical. However, it is still fresh, and there have been no "relationship" talks besides us both wanting to take things slow; we are merely just dating and I have no idea if he is seeing anyone else, though I'm doubtful. 

The problem is, he's leaving soon to go on vacation in Greece for two weeks, and I am leaving on a week vacation with my sister two days after he arrives back home, so with travel times and everything we will not see each other for almost a month. 

I am slightly stressed because I *really* like this guy, so how do I keep him interested and make sure this thing doesn't fizzle out after being apart for so long? **Best case scenario would be if we could hang out in between our vacations - is there any way I can suggest meeting up during the two days in between without seeming desperate?** Has anyone else experienced anything like this, and how did it work out?

I know the obvious answer is "if he's worth it he'll stick around," but is there anything I can do to make sure he does?
<bot>: Won't see guy I'm dating for almost a month, need advice on how to make sure it doesn't fizzle out.