My boyfriend has just entered the military?

im not a wild person when it comes to relationships... i take take relationships very seriously. I meet the love of my life in the 11th grade and we finally went together in the 12. we have now been together for a year and 4 months. I know for a fact i don't see my self with anyone else, he started training for the air-force special forces, so hes gonna be on active duty... my question is how do you beat the loneliness. I don't need attention from attention from anyone else except for him and now this is the first most complicated long distance relationship that ive been in. I love this man with everything that i have and i do not see my self with any one else.. ive tried keeping a diary but in all actuality i feel like its another excuse for me to go crazy by talking to myself. I need help so bad