I want to get a tattoo while traveling with someone
Why this specific person?
I don't really know anyone else.
I think that that is a cute idea! It's is an awesome souvenir and a great way to always remember your trip with them.
Well unfortunately they don't want one so, my plans are foiled.
Well if they don't want to get a tattoo you should respect their choices. Have you considered other things that you could keep as a souvenir like photos?