To not give any impression that the romance can be rekindled.

It's best to avoid contact.

Concern will only befuddle him and prolong the pain.

A good breakup is a clean breakup.

It's pretty much impossible to be 'just friends' at this stage, so don't think for a moment you're doing him any good for caring him.

One month is about the longest amount of time a guy would need to return to his normal life and routine - most guys would have gotten over the pain of the breakup in about two or three weeks.

Within six months, unless he's a real psycho case, the post-breakup rollercoaster ride would have long ended.

...he attempts to leave the past behind and move on to his future.

be very clear that you are only offering friendship.

blahblahblah.

hahahahahaha. mmm. food for thought.