okay scarlet, I have so much to say on this..I have posted quite a few times abotu jealousy on mumsnet, because I suffered from it in an enormous way for a long time, and I used to behave like your DH.
However - what saved me was two things. Firstly my own decision that I didn't want to live with it any more and therefore choosing (note, my decision, nobody elses) to spend a year having serious therapy on my own. It was bloody hard work - and for that reason teh decision to have therapy has to come from the person who has it.
Secondly - I met my partner who was a combination of supportive but very very no nonsence.
It is NOT your job to comfort your partner and reassure him every single time he beahves likes this. He is responsible for how he acts and what he says and does, just as I was when I had this issue.
It is your role as his partner to be supportive IF HE IS TRYING TO RESOLVE IT HIMSELF. sorry for capitals but really want to stress that.
My partenr, who is my soulmate, has absolutely no interest in making me feel better if I make a fuss about him talking to someone - he has zero tolerance of it. However, when I first met him we had long talks about my insecurity and he was deeply and amazingly supportive of my battle against jealousy.
I have totally overcome it - but seriously, part of the way that I came to realise I needed therapy was because I saw other people had no time for it and would not tolerate it.
You are not helping him by giving in to it.
You need to sit down with him and say that you will no longer tolerate him talking to you like that - focus very much on his behaviour.
One key thing I read that helped me was 'you may not be able to help having jealous FEELINGS but you can always help ACTING in a jealous way.' After I started to see that I was really in control , that was the first step to complete self change.
please, do not ever again put up with him glaring at you/ harassing you/ questioning you.
A tip - my partner, in the beginning, used to get that kind of crap from me! He would say clearly 'you are being really silly and I'm not interested in talking about this.'
I have to stress, he was not being dismissive of my childhood issues etc as we had endlessly talked about them - and he was, in a calm setting, always prepared to talk through my fears. But day to day he would not pander to my niggling and nagging...it worked. I simply stopped and following that, because I was acting differently the thoughts went away too.
Tell him you are there for him if he wants to change, but otherwise you are simply going to stop tolerating it.
It is appalling that he is making you fear talking to people - Im afraid I do pick up controlling issues in what you say. I totally understand his fears, but you cannot be his nurse/ sort his life out unless he chooses to engage.
happy to talk more about the things I did to help myself overcome this if you want to PM me...