" I was yelling and crying and insulting."
That's a lot of drama for a (six week) relationship!
This is generally the "infatuation period" where two people are head over hills with one another, bending over backwards to please and impress one other, showering each other with affection and gifts.
Any semi intelligent guy faced with a scenario where after only 6 weeks a woman is yelling, crying, and insulting him regarding his ex-wife of 8 years ago has got to be wondering if she's mentally stable.
If she acts like this after only 6 weeks one can imagine how she'd be in 6 months! You're supposed to be still "getting to know you"
Generally speaking two things happen when you explode at a mate.
1. They decide whether or not you are worth staying with.
2. If they stay they go (silent) on issues they know upset you.
We live in an era where people are constantly complaining about a lack of communication in relationships. If someone talks to their mate about their ex at least they know they aren't hiding anything. Odds are they may be comparing how much better life is with you or how their ex mistreated them, what they learned from it and so on.
Rarely does someone talk about an ex in "glowing terms". On the one hand someone may feel victorious in changing their mate's topic of discussion. However it's important to remember C.S. Lewis quote:
"Spiteful words can hurt your feelings but silence breaks your heart."
Discouraging anyone from being "open and honest" with you is never a great thing. You also can't expect someone to understand what "baggage" you have with you in six weeks. (jealousy/insecurities)
Maybe you have some experience with exes who dumped you or cheated on you and now you've overreacted by jumping on this guy.
If you or your mate have to (make changes in your core being) to make the relationship work there's a good chance you've chosen the wrong person for yourselves!
The goal is to find someone who (already is) the kind of person you want to be with. If a guy bringing up his ex is a turn off to you then he's not the one for you! (Move on)
There are only two ways to experience joy and peace of mind in relationships: We either get what we want or we learn to be happy with what we have. Accept them as (is) or move on.
The choice is up to us!
All you can do is apologize, explain how your past experiences may have triggered your reactions, and offer to give him space while promising to never let that happen again.
Tell him you'd like to start over.