Just be completely honest with him. I understand thats got to be very hard considering the awkwardness but the fact is in the end both of you agree on having a friendship. Be confident and tell him things havent been sitting well with you since the whole confession and you just want assurance he still wants a meaningful relationship with you. In other words you just want to put the ordeal in the past, you have acknowlodged your hastyness.

Remember word this however you want, but DO NOT pretend everything is still okay because the fact is you know its not. Bring him somewhere alone, and away from alot of people before you tell him about what you feel. The last thing you need is your environment throwing you off. Also refrain from telling him about everything on SMS, email, or IM. Although what I'm about to tell you is cliche` its ABSOLUTELY true. Over the interwebz it just doesent mean as much. Do this face to face.