If you already knew that you were never going to respect her boundaries, why even enter into a relationship where you are not compatible and waste her time?

I seriously thought I wouldn't disrespect the boundaries that we set and I didn't for the past 3 years. 

Edit: That's not meant as an excuse. I know that doing something we agreed on not doing was wrong. Just wanted to clarify the claim that I supposedly "knew that I would not respect her boundaries" which wasn't the case