my boyfriend is leaving for 5 weeks?

my boyfriend is from spain, and he is going back for 5 weeks today. i trust him and he trusts me, but i just don't know what i'll do without him. lately i've been thinking about how military wives let their husbands go for years at a time in unsafe environments and how lucky i am that that's not my situation and that helps a bit, but i still am so depressed! his plane takes off in about 10 hours/: how do i keep myself busy? we are only 14/15 but we've been together almost 10 months & i need some ideas on how to cope with him leaving. he will be gone for my birthday as well. /: