Long distance Relationship

So I started talking to this guy in Jan. 2015 and we met on tinder. We talked/texted and snap chatted everyday since. I was hesitant to meet him but in May I finally agreed to. Instantly it was like "where have you been all my life?!" There was no awkwardness and we were laughing and smiling the whole time like we'd known Each other forever ❤️ we started seeing each other every week or so throughout the summer even tho he lives in a town about an hour away. I met his Dad and he showed me all over his small town where he grew up, the house his grandfather built w/ his bare hands, it was so cute. Then I started university in the Fall and he had to travel for work, we haven't seen each other in almost 9 weeks now but we still text everyday throughout the day when we can and try to snapchat too, but it gets so hard being apart for long periods of time! I always tell him how much I miss him but it doesn't seem like it's enough. How do you keep your long distance relationship strong?