Sounds like your H is one of those romantic, want to be "in love" types. I suffer from this nasty affliction at times myself
But ultimately, that is HIS issue. You can only be yourself and hope that he realizes what he will lose if he decides to file again.
I've been through a separation and reconcilation. There is only so much either of you can do to MAKE the other person stay and work on the issues. They need to each freely choose to do that because they want to.
You sound like you are working on your own issues (anger management) but it it still a problem for him. Are you dealing effectively with this problem or not? Because I don't think the SL is the foundation of the problem. What do you think?