I would not even think about OM3. I would continue to focus on your healing and growth. You are not responsible for her issues - she owns them. You own yours. It is that simple.
The feeling of wanting to vomit is normal. You are still dealing with the hurt inside of you. This is why you really need to work on healing dude. This is going to take time.
Personally, I would go to MC, if for no other reason but to show her what she is missing. Show her the new Jasper. Show her the growth that Jasper has made. Will she return? Who knows - but maybe just maybe you will inspire her to turn her life around, which at the end of the day is really the right thing to do.
You say that you do not know her...your right...just remember that she does not know her.
Always do what is right buddy and leave the rest to God.
God Bless, Eric
"The difficulties of Life are intended to make us BETTER,not bitter". "Fear is a prison, where you are the jailer. FREE YOURSELF!" "Life is usually all about how you handle Plan B." - Jack3Beans