I’ve changed

I’ve made mistakes  
One or a few
I regret them all
But they’ve only led me up to you  
I’ve hurt you unforgivably  
But you managed to stay
I promise to change
In the best of ways
Your my best friend  
If I lose you
I don’t know what would happen
But it wouldn’t  be good  
Hang around a little longer  
You’ll see the changes
I promise you will