We all "snoop" and you found out the consequences.

I applaud you for "outing" yourself. Did he say anything other than he was OK if you read his posts?

I also applaud your bravery (or was it morbid curiosity) to read his posts and your humility and empathy which allowed you to better understand his position.

You can not "unknow" this, now.

He is still feeling pressure (based on his "no" answer to lunch).

You need to be attractive, you need him to see your positive changes and allow him his time to trust them and believe they are permanent (the SHOULD be), and you should work on patience and stop pursuit. Stopping pursuit does not mean N/C.

Just continue to become a better option... and be patient...