Was my apology all for nothing?

I've always had a hard time even saying ''I'm sorry''. I gave my brother's finacee a very hard time and nearly broke them up a couple times in the past.

I took the advice of several people and a psychologist about the important of admitting when you're wrong and accepting responsibilities. I did that. I've apologized to both her and my brother.

The only reason I was still invited to their wedding is because she didn't want to hurt my brother. She didn't believe a single word in my real apology, can't accept it now and only time will tell. Once again, this was hard for me. I've never in my life delivered a long, heartfelt apology. It was sincere. Was my apology all for nothing?
Was my apology all for nothing?
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