Here's what your getting in your desire to have an amicable divorce... you are getting manipulation, bribery, drama, emotional blackmail and anger. Just like you couldn't force him to be the man you wanted while married, you can't force him to be who you want him to be in divorce. He isn't capable of being amicable.

In the future, if you bump into him, there is no requirement to linger. You don't want it to be awkward but what's wrong with awkward? I'd rather spend 2 minutes in the future being awkward than waste hours now experiencing anxiety and stress worrying about something that hasn't happened yet.

Don't let him control you by telling you not to tell anyone about his threats of suicide. If he threatened to hurt you, would you report it? If he threatened to hurt someone else, would you report it? He doesn't want anyone to know what exactly... to know he's manipulating you. All you will be doing by telling his family is reinforcing your boundry of not being manipulated anymore.