Boyfriend going into the Navy.?

He's already gone through MEPs, is participating in a DEP program, and is going to be leaving for basic training in early Nov. He is going to be actually gone for about three and a half years. I know about basic training. What is my life going to be like after that? How often will I get to talk to him? how do they deal with leave? will he get time off that won't eat into his 30 days a year or what ever it is that he has? how much time will he spend on ships at a time? anything. everything. I just want to know.