Showing is not about getting in front of him and showing him all your good or "fixed" points, nor verbally telling him (he possibly does not trust you so won't believe your words, anyhow).
The little contact that you DO have with him, must exude these positive changes in yourself. They will be genuine and HE WILL notice. Also, there is always "back channel" that will likely get news of "the better you" to him.
And finally... you DO want to engage him... as scary as that might feel, for you...
It IS... after all... what you believe you want...
And as things move forward, if the both of you recommit to the M... then you will want to investigate and work on any past issues, so they do not crop up, again.
