Sounds like you really regret what you did. I wonder what was bothering you so much that you decided to do that? I know you already are feeling bad enough and that you know you did something that could ruin the relationship. I don't know much else to say on it that you probably haven't already thought of. Sorry you are having such a hard time of it. You might want to try and see a counselor about it because it might help you to resolve this. I don't want to judge and believe me many people have done the same thing and felt horrible, too. Hope you will post here some more.
<font color=purple>"Shared joy is double joy; Shared sorrow is half-sorrow." Swedish Proverb</font color=purple>