I get how that could be “annoying”, I don’t get how that could be “bullying” or “fat-shaming”, because honestly, it really isn’t.
The worry seems to come from a place of love and care from what you’re retelling, pushing away that advice from people close to you is not a solution to anything.
Edit: also it seems like you told him to stop after 2 times, when earlier you mention it happening every 3-4 days… It’s not my place to ask but obviously your story has holes in it.