Mid-teens, in and LDR and super horny.

[Achemobile]

I'm currently in a long distance relationship. I love them, but it SUCKS. 

We're both in our mid-to-late teens and AFAB (though they are transmasc). They live 5+ hours away from me and we see each other twice a year, tops. I only have a permit due to my state's driving laws so i can't get to them on my own. Our relationship was originally based on heavy sexual tension, and while we do, of course, love each other emotionally, physical intimacy is a huge part of our relationship. I managed to get a ride to their place last week, and things got intense in the best way possible. Now that I'm back home I miss that intimacy so badly and nothing I do helps. We have long conversations multiple times a day, and hearing their voice makes me want them in person even more. I don't want to fool around with other people, which should need no explanation--but being alone is not satisfying, and the frustration is taking a heavy hold. I have no idea what to do with myself. 

Help!