3 weeks ago today I hurt the person I care about the most....I know I messed up and I have no Idea on how to get her back. I've tried letters, leaving her a few voicemails explaining how sorry I am. I just have no idea on what to do anyone have any suggestions. I am at my wits end here over the whole thing.

Just keep trying as sometimes they just need a little time. However, if you really hurt them badly then there might not be anything that you can do except to learn from this experience. Sorry.