Hey, sorry to hear that your not getting the support you want. Dont remove your sons food, resisting them will make you stronger and feel better about avoiding them, its also not fair on him.
As far as going to the pub....just go, keep to cranberry juice or water...if you really wanted a drink gin and slim line tonic is only around 135 calories.you can treat yourself without having to give up on a social life.Or if you dont want to drink alcohol, have your water and think of it as when you were pregnant you went 9 months without drinking, it was only a period in your life, it ended
look at your diet as only a period in you life, its not forever, it will end.
Talk to your fiance and tell him your feeling more positive and are losing weight for yourself and not him and you will be happier with yourself, if he loves you the way you are then he will love the new you just as much especially seeing you happy.
My boyfriend "loves me for who I am" too but I sat down and told him I am determined to do this and if he saw me going to sneak a snack or anything I wanted him to stop me and even be a bit harsh if he has to. It may help telling your son and fiance the same thing.Just tell them you want their help to not eat things and tell them to be a little mean, not call you names or anything but be firm with you. it helps
do a wee bit internet shopping with your fiance for some aerobics dvds from amazon or something and get him involved by asking if there is anything he would like to buy, like cheap dumbells or something so you could do stuff together, that what my boyfriend and i just did, though he is fit and with a 6 pack haha, he enjoys working out so we will do it together.
I dunno if any of this will help but I hope so.let me know how things go.xxx