Firstly, you may be extremely tired (sleep deprivation, breast feeding umpteen times a night) and this can cloud your judgement. Plus, please forgive me for saying this, as I am only trying to sound out all the options, plus you may have post natal depression, and that too clouds judgement? Because you may be seeing too much in this, and dare I say it, overreacting?
You are breastfeeding and it's unlikely you will be as slim as you were pre-pregnancy, because the body holds onto fat reserves in a different way re the hormones (or something, it's been along time since I breastfed). This is not the time to worry about your weight. You will be a bit 'cuddlier' while you are BF. And nothing wrong with that.
He is probably trying to cheer you up with the kind of things that make him feel good when he's tired. As other posters have said, it's not the best nutrition, but if it's nice, then you can have a little chocolate here and there, can't you? Moderation in all things. But tell him what you'd like. Also, he may feel that you are doing all the hard work and he can't help, so the chocolate is a kind of guilt related thing.
if you think he is a 'feeder' - did he do this pre-pregnancy? What are your reasons for thinking he is doing this.
I breastfed for 2 years and one month. In that time I was so tired I don't know how I managed to go on. My HV told me I had to stop for the sake of my own health, but I didn't know how to. (I did eventually just go cold turkey, and that was that.) I had 10 veruccas that just wouldn't go away. It is tiring. It's also a lovely time, and a valuable time. Your weight will adjust in time. But it's such early days.
Good luck x