Sexual frustration with long distance relationships...

I'm 17 my boyfriend is 18. We lived in the same town but I recently had to move. I'm now an hour away from him. We both go to school, so we only get to see each other every other weekend. Recently I have been feeling a lot of sexual frustration because of the distance... I try to sext with no photos to him but it always goes south because he gets nervous that I'm going to get caught. (I did get caught about 5-6 months ago because of photos I shouldn't have sent...) what should i do...? I was thinking about getting snapchat for a bit more "privacy." I love to feel sexy for him and it just makes me feel amazing. But because of the distance it's been hard.