I'm not going to cut off my ex quite yet.
Why are you going to keep your ex around?
I still like him, and I'm confused about my feelings. I just need time.
It's tough sometimes when you break up with someone. It would be wrong to string him along with false hopes, but sometimes it's normal to want someone around when you used to have feelings for them. Just make sure you're not taking advantage of his feelings for you.
I'm not going to tell him anything. I'd like to keep him very confused.
What exactly are you trying to achieve by keeping him confused?  Ultimately he's going to resent you for your treatment so you better move on and find someone else who you're not confused about.