She deserves someone who doesn't make her want to cry all the time

I screwed up a lot while we were together and up till now, even when we aren't exactly an item, I'm still screwing up a lot, making her cry so much and making things so difficult for her. She deserves better than me and my never ending list of issues. She deserves someone who doesn't make her want to cry all the fucking time.

I want to be that person.. But I just don't know how.