confession falls short
Your author's comments indicated this is a serious work, so I'll critique it as such.
Overall the most important thing in an apology is not saying you're sorry, but acknowledging what you've specifically done wrong and why you've hurt others. Following that, "I'm sorry" means so much more.
And I don't just say that as someone who has had to aplogize many times, or who has desired an apology many times...
As a viewer, I didn't get that from you. I got a lot of "I'm sorry," but I didn't truly understand why, and for what you are sorry about. As a result, your animation - which came off sincere and uncontrived (something few "serious" animations here on NG manage to do; so, bravo!) - fell short of poignancy.
Visually, the graphics and illustration were well rendered. But, I think the style you used to illustrate the person was both too slick (something we might see on some hip, modern ad or MTV clip), and it also did not provide you with the means to show us nuances in the face, which can portray emotion.
I think that this "genre" (if you can call it that) can be very effective. For reference, you may want to buy/download a song by Slint called "Good Morning, Captain." It's one of the most haunting, moving, cathartic songs ever - and it's almost entirely spoken/screamed word (very Slint).
The song closes with this:
I'm trying to find my way home.
I'm sorry...
...and I miss you.
I miss you.
I've grown taller now.
I want the police to be notified.
I'll make it up to you,
I swear, I'll make it up to you.
I miss you.
You must hear it. And then I think you might see the value of providing richer detail and the appropriate atmosphere. Hope this helps.