Help! How to deal with people trying to sabotage your weightloss journey

You have to learn to tell people no.
"No thanks." (keep saying it until they get the message) The less explaining you do, the more effective it will be.

My doctor told me I have some medical problems from being overweight and out of shape, so when people push food on me or when I am pressured at a restaurant, I just say that I have a medical problem -- that works like magic.

No one tried to sabotage my weight loss.

Sure, people offered me food ... but I just looked at it like this ...

I am intolerant to peanuts and some dairy products. If I were to eat a dish loaded with peanuts or something with a lot of fresh cream, the results would be painful and, well, explosive. So if someone were to offer me a scone laden with cream or a party mix made mostly of peanuts, simply, "No thank you."

I just applied the same technique to being offered something I could eat but which didn't happen to fit into my calories for the day.

Can't you just let him know that you're trying to make some lifestyle changes? Let him know that you think it's best that you go ahead and buy your own groceries. Set aside individual spaces in the kitchen for the both of you and/or label your groceries as well. Is this something you can do?

At first I tried to argue and justify my plan. There were a few who constantly tried to sabotage my journey, including family and friends. I even had a very best friend secretly call my husband and tell him I had an eating disorder! It caused all kinds of worry. After a while I realized that it's about me and not them and most of the time people are just afraid of what they don't understand or jealous of what they aren't able to do. I stopped trying to justify my actions and ignored the haters. Just learned to focus on myself and my own journey. Little by little I eliminated the toxic people from my life... wasn't an easy task because some of them were loved ones and even family. But I did it, and then I re-build my circle... and surrounded myself with those who were on the same journey as me. Mostly gym-buddies. I actively sought out people who were working hard to change their lives for the better thought nutrition and fitness, and I stuck with them for motivation, encouragement, support and new friendships. Once I hit my goal I was able to look back and be proud of the struggle. Those who were against me, who didn't trust in my process were finally able to see my achievement. I sat back quietly and let them stew in their own past misconceptions, words and mistakes. I am still moving forward... always happy but never satisfied and by now the sabotage efforts are long in the past. You'll get past it too, just learn to be strong, be confident in your actions and decisions and ignore the haters. Since this is your housemate and I assume you're splitting the cost of everything, just simply tell him to shop for himself from now on, and you can shop for yourself. As you get more and more fit and healthy with more energy and a more positive and healthy outlook on life he can be consuming the same garbage and stuck in his own head wondering what the hell is going on LOL! Sooner or later he'll come around to your way of thinking and if he doesn't, it's his problem not yours.

I'm not completely understanding. Do you and your housemate commingle your finances? Why not just each get your own groceries? I never shared grocery budgets with roommates.

On an aside note... this is why I don't let my husband do the grocery shopping LOL! He comes home with meat and sweets, and maybe some chips. Although he does buy a lot of fruit, I am not a fruit person! Nope... I make the list, I do the shopping, I do the prep. I do buy some of the stuff he likes as well but he pretty much eats what I cook him!