In my experience keeping in contact is only going to prolong the pain for you both.

You say you can hide the hurt. You've been doing it so long you're a pro.

Me too.

I was wrong.

If you are hurting there is every chance that you're going to take that hurt out on the one that caused it. Even if their hurting you wasn't deliberate.

Remaining friends is also dangerous in it's ability to keep hope alive.

If either of you hold any hope of a relationship this will only end in tears for someone.