SHE REJECTED ME , Because I AM RUDE AND MISERABLE AROUND HER. But she was interested before, so yea. CAN I SAY THIS.

Look, I honestly know that this would have no effect on what I wish could happen but I want you to know how deeply sorry I am, for being rude and seemingly miserable towards you. Hopefully, you might be able to read my bad handwriting , but I am really glad I met a girl like you. God must have been smiling on me that day. Apart from the fact that your best attribute is your personality, your also really cute. I am grateful on how your always there to talk to. I remember when I saw you wearing this white blouse, it made you look so beautiful and I knew I couldn't make an amazing girl like you slip away. Basically, I just want to apologize and tell you, I genuinely care about u. But stuff just doesn't work out that way. I just wish you gave an actual and fair chance to show you how I really am.

AFTER THIS CAN I GET HER BACK OR WAT SHOULD I DO.
PLEASE HELP ME

If this the same person you have been talking about for most of the last year, then I seriously doubt anything you'll say would win her back.
The game is dome and you failed..

You apologize and then it's up to her. She may respond and she may not.
Don't push the issue.

The only person that will know if your apology will work, is the person you're apologizing to. We can't answer for her.

I haven't read your other posts about this girl, but it sounds like she wants nothing more to do with you, that the relationship is over. So I would suggest that after sending her this apology, if she tells you she's done, leave her alone and quit hounding her.