Hey Jinny, part of what makes us complete people are flaws..........you are so caring to actually feel so badly for hurting another. Your empathy and compassion are a gift. Saying you're sorry is difficult to do. Don't berate yourself further, you are not a *****!
Sometimes we let people down, and usually it's the people we care for or need the most....this is why it's hurting you so bad.

I like you so much more after reading this thread.

I would be so lucky to have a friend like you, a little afraid to trust like me, and admit to misunderstanding others......that would make me feel safe as I relate and perhaps your friend can too. Push all you want, if your friend is true they will always be there for an apology and in return give a hug of acceptance.

BTW, you absolutely deserve it, we all do.