Dear H:

How about this apology message: I am so sorry, I realize that in  these past three years, our communications have been about me, one sided, like  you said, almost always. I wish I made  it also about you, I wish I gave you the  time and attention that  you  needed. I want to correct this, if you give me a chance, and make  our future communication about you and not just about me.

Will you give me this  chance?

– something like  this, what do you think?

anita