Most Helpful Guy
I know I'm going to get some people a little mad at me, but I just think long distance relationships are a bad idea. I know it's only my personal opinion, but every person I have ever known (myself including) who had a long distance relationships ended up with someone hurt. In the Church I grew up in, the young adults (18-21) were expected to leave on a mission for a year and a half, with only letters for contact. So their girlfriends/boyfriends would promise to wait for them. They would come back only to find out they didn't. Someone always ends up moving on while the other is trying to be faithful. So I wouldn't say anything. If one of you meets someone during that year, then the other is just going to end up hurt. If your both still single when he gets back, then take up where you left off. I know it sucks, but I have just seen it happen to many times.
Most Helpful Girl
If you don't you lose your chance. If you do and he leaves anyway - ad least you tried.