>>122080(Assuming you're 19)
If you're very intelligent, very tall or look old then people would be accepting
Bonus points if he looks young and is very attractive.
If you're five feet tall you're screwed
People are shallow, yes. An obese guy is seen as way creepier than a skinny guy for no rational reason whatsoever
But it's fine really as long as you're not on the spectrum or a dumb dumb, then it is indeed very creepy. If your and his parents are ok with it it's all that matters, NPC's opinions don't matter.
Though it's unlikely that you're a good fit for a healthy relationship, needs to be a really good match for an age gap to work out