My boyfriends going away to miltary school what do i do ? stay with him or not :( ?

me & my boyfriend have been dating for exacaly a year and a half . hes going away to miltary school soo he can get his life on track and he wants me to be here for him when he gets back . he still ants to be together , but hes going to be gone for 5 months . and the only way ill be able to talk to him is throgh letters . he doesnt get too come home very often maybe like twice and he will rarely ever get to call me . also he cant talk to me for the first couple weeks hes there . im only 17 this is my senior year of high school , my last summer of high school and hes leaving in 3 weeks , we still have 2 months of summer left and half of senior year . i love him with all my heart , more then anything in the world , shooot he is my world . but its just so hard .. he hasnt even left yet and im already crying every single day ):