General

If you worry about what people think or say, then perhaps gaining is not for you. You are also under no obligation to talk about it to family, friends or strangers. You can mention that you are happy at your current weight. If they keep bringing it up, you can tell them you don't want to discuss it. If they keep it up, you can leave. Obviously that will not work with family if you still live at home.

I have been shamed before, I then told the that I kind of liked it. That then takes the momentum out of there shaming, and they don't know what to say but agree.

Yes.