I understand how you feel sis, I would get hurt if I saw my wife just look at another guy in a wrong way, it's jus the way I am, get jealous easily when i love the person.
when I marry I don't plan to speak with no women whom it's not halal for me to speak with unless there's a necessity, and I expect my wife to do the same. I wouldn't like her to smile and say hello to my neighbour unless the neighbour was a women.
I'm sure you know the saying,
"it starts with a look, then a smile, then conversation, then a meeting place, then zina"
I think it's perfectly justified for you to expect your husband to not talk with female neighbours or any non mehram women without necessity, he can jus talk to the male neighbours if he has to talk to them.
I blank the women who lives next door all the time, but I'm friendly as anyone with her husband.
"people may say I'm rude, but I don't care if I'm rude towards women who are nothing to do with me, it's my immediate family Islam teaches me to look after, my wife, my sister, my mum".
and for a man to talk to a women in anyway he has to look at her, what if she's attractive to him and shaytaan puts a desire in his heart for her. And this is why even looking at the opposite gender after the first look isn't allowed and you have to lower your gaze, never mind talking with them.
and in the time of the prophet pbuh, there was none of this mixing unless there was a neccessity, when they would leave the masjid the men and women would all walk on 1 particular side of the road so they avoid mixing.
I think you should watch this link sis, it's only 5 mins long about free mixing, the brother sums up how I feel about it :)
http://www.youtube.com/watch?v=U2LKS57ju38
let me know what you think about it^^