Get used to it, that's the way it goes down. Some people will even actively oppose your losing weight. Others will even try to sabotage it. It makes other people insecure somehow.
When I was losing weight, absolutely nobody supported me. My toothpick-thin barbie-doll gf dumped me because she thought I wasn't big and scary enough anymore to keep the other men away from her out in public. My co-workers offered me some sort of birthday cake like 3 times a week (I worked in a large business unit), and they always told me "won't hurt you to have some now, see how much weight you've already lost". I refused to budge or bow down to anybody elses will. I was unflinchingly uncompromising, like a rock. And I reached my goal through sheer willpower, then I bought myself an Armani Collezioni suit.
You will need to learn to deal with it because people won't stop trying to tempt you - they most likely will even tell you that you think you are better than them, rude, and unsociable. Whatever, it's your health at stake. I haven't eaten pasta, rice, potatoes, etc in more than 4 years. Not even once. I'm 47 years old now and I've got more "manly" function and stamina now than I did when I was 18, if you catch my drift. Without pills. When I was your weight, I seriously almost got a heart attack while carrying a rack of beer (20 x 0.5 litre bottles) for 200 meters. Today, I can carry one on each shoulder for that distance without breaking much of a sweat, let alone running out of breath.
Set your target and approach it like a train in a tunnel.