Surviving long distances?

Alana
I'm 17 and so is my bf. we've been together nearly five years but after we graduate I'm going on an exchange for 10 months. I'm not ready for the relationship to end because he's my everything. We're leaving it as we've not officially together but it's not a forever break up, we could pick it up later of we want to. I think that's the right thing to so because he's going off to uni and I can't guarantee he won't find someone else ?. But has anyone survived thorough long distance so young ?? Sorry guys I just need some reassurance.