Consider is the tables were turned and you wanted the relationship but he believed it was over. Would you want someone you care about and who you thought cared about you to "drive you off" instead of being gentle and honest with you? Or would you prefer to know the truth that may help you process the breakup and create an even better relationship next time?

Think about how you can express your feelings (or lack of feelings) to him in a loving way.

"Although I've really enjoyed our relationship to this point, I'm not feeling what I need to feel for us to continue, and I think it's best to be very honest with you." might work.

It's a good idea to share something you really like about him or your past relationship before and after to soften the blow. Would you appreciate someone treating you in this way?

Breakups are hard regardless and whether now or later, your honesty will be respected by both of you.