Me [17 M] with my girlfriend [17 F] are wondering how to ease not seeing each other for a year?

Hello, so me and my girlfriend are in an online relationship and going to meet in around ten months for the first time.

And I just wanted to ask: how can we ease the time so we don't fall apart or lose interest in each other, because we wouldn't see each other for a long amount of time, and I'm afraid time can do some horrible things if we can't keep it up together ;X

tl;dr: It's about ten months until we meet for the first time, how can we overcome the time easier?