OP, the outrage you feel about how he is in his relationship - isn't all this just to avoid your real feelings - you wish she'd bugger off out of the picture and things would be back on with your friend, as before, is that right?
Anyway, this is based on my experience and it may or may not help:
- I have male friends who I have held hands with and hugged, and who have told me they loved me and that i am beautiful. The friendships were totally platonic both sides. Other posters have said this or similar too. My male friends and female friends and I will all frequently share a lot (too much) with people we trust - ie talk about personal and intimate things. I think that this is quite normal. I think you should read through the more unkind things you have written about the man you think the world of again in that context.
When he was saying "can you believe that?", did you try to talk to him to explain what it is like to be in a relationship with coercive control and how common it is, how many women are affected, to try to get him to understand better? It sounds like he doesn't have a clue how horrific it is - could you not have told him?
- Some of my male friends will sometimes treat women badly - and I make it clear I disapprove. In my world men like that are known as "players" and basically they find emotional intimacy hard and they treat women they are in relationships with badly to try to keep them at a distance. The same for women who play games. It may be that this is the case for your friend, or was.
Has he recently seemed to change his outlook about emotional intimacy, hence him wanting to have a relationship with this other woman? If so you may have been thrown into a tailspin, if you don't just see him as a friend.
It is easier for you to feel outrage about him and make out to yourself he has done something wrong (even though you think the world of him as a man...) than deal with your own feelings.
If that is right, I can tell you for sure that if you don't accept, deal with and process your feelings, then your feelings will come out in inappropriate ways - being angry, feeling badly done by, taking out your feelings on other people, losing your temper more quickly, treating other people badly.
But if you could start to focus more on your feelings, rather than his wrongdoings, then it is going to hurt you badly for a while, but you will get though it, and you will come through it stronger, more self aware, and more ready to find the right person for you.
I hope that things get better for you, for him and for her. I have been in a similar triangle hence me bothering to write all this, but I have nothing else to say so will now just leave it there.