Awful @Bitesizerainbows and you have my utmost sympathy. I think a lot more men have tendencies like this, than some women care to admit though. I think his reaction, and his behaviour is not necessarily showing that he thinks very little of you, but moreso that he is jealous and threatened.
My DH has a tendency to behave like this occasionally.
He used to work with lots of women, and thought nothing of chitter chattering to those women. Occasionally stayed behind at work for half an hour after his shift had finished to listen to 'Linda's' moaning about her boyfriend, or to help 'Laura' calm down because she can't cope with her teenage daughter's tantrums.
And around 7-8 years ago, I was with DH and we bumped into 'Pat,' a woman he chatted to, in the lunch hours and break times some days. Pat said 'oooh, we have a laugh don't we? Some people wondered what was going on between us a little while back, as we used to be hanging around in the warehouse laughing together.'
I was like
My DH looked like
and said 'no Pat, I don't think anyone thought anything actually....'
There was nothing going on (as far as I know,) but I was a bit pissed off that she said it. I thought 'what the fuck did she say THAT for? To his WIFE?' 
DH said to ignore her, and that I didn't need to be jealous.
(I wasn't. I was just gobsmacked at what she said.') He had said several times not to be jealous of him chatting to women at work. I said 'I'm not. And I don't know why you think I am...' He would say 'yeaaah OK then!'
I think he wanted me to be, as it boosted his ego. (Bit pathetic I know...)
Anyway, his being chatty and friendly with women carried on. Then just a few months later, a man in our street saw me for a third time that day. I saw him when I went to the post box to post a letter, I saw him when I was pulling weeds out of the cracks in the public footpath, and then when I was with DH on walk. This man said 'Ooooh, you again! They'll be talking about us at this rate!' I just laughed.
When he had gone, DH said 'not with your fucking HUSBAND with you they won't! Cheeky cunt.' I said 'awww, there's no need to be JEALOUS.'
He said 'well I'm sure he won't want an old senior like you anyway. I bet he prefers younger women!' (I was 45, and this man was around 40.) 
I thought 'ooooh, someone has been stung by this man's words!' 
He has always been actually quite complimentary, and tells me I am gorgeous and he is lucky to have me etc etc, but when he is threatened/jealous, he has a bit of a mean streak....' Not a nice trait, but thankfully it's very rare he reacts like this. But when he does, it IS when another man is involved, and chatting to me, showing me the slightest amount of interest.
Definitely proves he's jealous when other men show me any interest though. VERY jealous. And so is the OP's husband.
DH hasn't behaved like this since that incident with the neighbour 7-ish years ago, and he also doesn't talk much to the women at work anymore! But when a man chats to me, (and DH is 20 yards or so away,) he trots across very quickly so the man knows I am spoken for! Then he says 'who was that fucking weirdo?' Still got that insecure jealous streak!