My Boyfriend Just Left For Army Basic Training :(?

Okay so my boyfriend of 3 years (18 years old) just left for army basic training at Fort Benning.I'm 17 and i support his decisions fully.I will always stay by his side. I'm having problems though coping and getting used to this.He is gone for the whole 9 weeks and gets back conveniently a day before his senior year starts. Next summer as well hes going for his AIT which i believe is 12 or 21 weeks so i need to find a way to cope.I can talk to him very shortly on sundays for religious purposes, but that time also includes his family and friends.Can people tell me their experiences and what they did to cope. Thank you.