Best advice I can give you tody is - if you meet someone who mentions his ex-girlfriend more than twice in the first three months - run away.
It's a shadow you can't and shouldn't attempt to walk in.
He has baggage that you don't need to have brought to a new relationship - let him deal with it and if he is really, truly, interested in you, he'll come and find you when he is done with it.
You deserve better than being treated second best.
