Just be honest and tell them stop if they always comment about your weight.
Generally good friends won't say anything to purposely hurt you but may mention you have gained a few pounds.
I don't understand why people these days won't stand up for themselves.
You don't tell other people how to live or they have to be slim do you?
Of course you don't.
Sure I had people tell me I was getting fat I just didn't acknowledge their comments.

You are very welcome.
Not often I comment but I know by experience that method worked for me.

I agree with Munchies.

I used to feel that way about how skinny I used to be.
Always felt awful about my body small boobs and no curves.
Now I love my body and feel 1000 times better about myself.
I'm not sure I would call it "confident" exactly maybe I stopped caring what everyone else thought.
I'm fat/ obese and that is what I want to be.
It makes me happy.

If you want to gain a lot you have to eat a lot.
No magic pill or food.
Heavy cream or ice cream before bed always made me gain.
Remember everyone is different so results will vary.
If you are real serious about gaining a lot you have to commit to it, not eat a lot for a week to 10 days expecting to gain a lot then be discouraged,
It takes time I mean months and years sometimes.

I absolutely do not like cold weather.
I keep a small heater under my desk at work because I get cold easy.
My BF is a big guy and he stays hot all the time.He wears shorts in the winter which is nuts to me.

Some people never get a double chin even if they gain weight.
I was like that for years a normal face with a fat body.
It sounds like you want to gain weight but have nobody notice. People will notice and you can't get around that.

If I wanted to learn something I would ask questions of people with experience that actually know the subject matter.
Then there are people that ask questions and if they don't like your answer will get offended at an honest answer.
Then there are the kind that don't listen and will keep asking over and over with no intention of listening to what you say.
My BF calls those type ask holes

Its a newcomer question and I get that but I feel people just don't listen.
My goal here is to give honest answers to people's questions.

Once again to answer your questions you can't pick and choose where the fat will accumulate.
All of that is driven by your genetics which means you have no control over where the fat will go.