moish, it’s impressive that you want to stop, you keep trying and that you are successful at controlling yourself for months at a time.
The first step to breaking a habit is determination. If you started this thread, I assume you already have that.
Without knowing too many details, I can only offer this: Often, awareness is key to breaking habits. Is there something that typically precedes the behavior? a specific occurence? feeling? interaction with someone? Try to figure out what causes it. Maybe you can remove yourself from the situation when you know you’re about to do it.
And of course, daven! I wish you much hatzlacha in dealing with this issue.
~a~