You clearly choose to invade his privacy when you went digging in his history to find his porn. You should have just dumped him and moved on with your life. Instead you went about this in a completely immature way and it caused a mess, all you did was sink to his level than went to reddit because clearly you feel some level of guilt, even if it's on a subconscious level.
You should apologize for invading his privacy and tell him you think it would be best if you see other people and leave it at