how do I let go?

Basically there's this guy that I started talking to over the summer. We became really really close and I honestly considered him one of my best friends, I even fell for him. Long story short when it came to that talk about dating he didn't want to, we got in a fight, and we stopped talking for a long time. Earlier this week I texted him telling him i was sorry and we talked and fixed things, and now we're okay and friends again. The only problem is he moved back home, and he lives on the other side of the country. I want to talk to him still as friends and keep in contact because I really do care about him, but i'm afraid that i'll become attached again and will never want to move on. I was just wondering if anyone had advice for how to distance myself from him. I constantly think about him ad was just wondering how to distract myself and really get over him.