Sounds like he had a lot of things going on in his life. Why was he in jail?
Yes - your actions were extreme. But whether or not it contributed to his suicide is something you probably will never know. You do seem to have a smidgen of empathy and compassion for the whole thing, however. That's a good sign.
Your "friends" don't.
They sound downright toxic to laugh at someone's suicide (although it may be a fear response) I suggest that you get away from them - and a wife who cheats on you and uses others (an unstable him) to provoke you.
Do some volunteer work. It may help you to increase your empathy for other people.