1. you are being disrespectful
2. that you know how she feels about it yet not change is being deliberately hurtful
3. your actions indicated a failure to prioritize her

If she IS to be a priority in your life you need to make that so which means slash and burn - cut all ties with your previous online daliances.

Sincerely, I wish you luck with this. I am experiencing this from the otherside right now as matter of fact and I am unsure if I can ever forgive him. This may end up being a dealbreaker.