Hi M.,
I just read your plea for help. I hope you get it! It is hard for me to answer your question except only very generally - since, your question is worded very generally. But here goes...
1) It sounds like you need some much needed ME time... - a chance to go out with your friends, cut loose and let your hair down and have fun.
2) I am not sure if the problem with going out in public comes from your husband making remarks about not wanting a baby ? when you do.. but if so, you need to just make that topic out of bounds when you are out in public. And give him a quick and easy reply so that he can tell others he is not going to discuss it.
3) The first year of marriage can often be the hardest. Only topped by the first few years of baby-dom. I would really really really really caution you to not even think about having a baby with a person if you don't think they are mature enough yet. I am not sure what your and your partner's ages are respectively but . If you have time (ie. you are not in your late 30's with a biological clock madly ticking away) then wait! work out your differences first! then work on having a baby. It will make the baby bits so much more rewarding and enjoyable when you have a good working partnership with your spouse.
4) I am not sure if your problem with "nonchalant and cool" stems from the fact that he does not demonstrate enough affection for you? or - more from the fact that he might be wanting to flirt/socialise with other women while at a party...?
I think if it is any of the above it is important to know yourself and know your partner. I know for myself and my partner both of us are pretty independent people that like to move around a room and talk to lots of people. Neither one of us is threatened by that sort of behavior in the other. But there are times too when I like to hold his hand or stand next to him. My guy is not a guy for much public displays of affection but every now and then I let him know how happy it makes me to dance with him or hold his hand while we are walking down the street. Anyways, know what you need and the personality of your partner. then sit down, and ask for it! If your hubbie is not mature enough to find some kind of path towards living up to your expectations then go out in public without him. And make it clear why. Just because you are married does not mean you have to give up on a social life together. I would cultivate your girlfriends and build yourself a support system so you are not dependent socially entirely on your man. All of this is super good to do now before you have a baby because when baby comes your social life is going to decrease by a factor of 10.
good luck and well wishes. I hope this helped a little bit.