I miss my guy friend I was friends with 2 yrs ago. Is it a good or bad idea to get in contact again?

Its kind of weird I still remember/think about him. Did I drift off for a reason or is it okay to try to contact him again? He called me a year ago, after we hadnt talked in a yr (living in different cities) but I didnt call back because I didnt think he was that good of a friend. So why would I miss him, do i have feelings for him?