Soo there is this guy..

Soo there is this guy.. And I think I like him. We talk everyday(talking on the phone, not txting) from like between 15minutes to an hour or so.. I know for a fact he likes me..he asked me out but he said “would you wan tto go out with me” and I said “like on a date or as a couple” and he said “yeah..” so I dont know which one it is and he isnt the cutest guy in the world but yeah. I dont want to let him down by saying no and then he not talking to me. He is a relaly nice guy and a great friend. What should I do? Should I go out with him as like being a couple or what? (btws we are both sohpomores.) and he lives like 3 miles from my house.. (if that makes a difference) help!