Help a girl out

How do you get someone to trust you again after you cheated on them twice, sent death threats to people they love and called them fat?


People really do change, and i have. I´m so much better now and i want him to see that. How do i prove to him i´ve truly changed?
If you´ve been hurt by a partner in the past, would you ever trust them again? If so, what would they need to do to prove themselves to you?