If you want to gain weight then do it. Eventually people will notice and after a while it will become normal and people will quit talking about you getting fat.
I had people tell me I was getting fat when I first started like I hadn't noticed. LOLOL. My usual come back was" yeah I know" or "if I don't stop eating so much I will end up getting really fat". That usually shut them up because they didn't know if I was kidding of if I really meant it.
The only one you need to please is yourself if you aren't in a relationship so go for it. Other peoples opinions about your weight mean nothing really. You don't go around telling people they are fat do you? Of course not.
