AITAH Refusing to split an appetizer.
Context: I (m34) and ex (m40) went to see a movie together and decided to grab dinner/a bite to eat before. I wasn't hungry and it was already decided to split a large popcorn during the movie. He wanted to stop by olive garden as we had an entire hour before the movie started. He had already decided that we'll only order mozzarella sticks and 2 waters (we'd split the mozzarella sticks). I wasn't comfortable with this as it feels like a waste of time for everyone involved. I offered to pay for my own share or even for both of ours as he'd pay for the tickets already.
This was a no deal and lead into another argument about how I need to stop caring about how other people think.
We both have worked as servers and in customer service at the same restaurant. He's the type to add on tips and I got what I got (another argument in itself).
The argument ended up with him telling me fine, we'd go to olive garden and he'll sit there and watch me eat.
Of course I'm not doing that. I can understand how he's frustrated with me which is why I offered to pay for my part or the entire thing. My issue is we're not even together anymore and we're going as friends. I'm sticking to my boundaries instead of giving in and being uncomfortable... but AITAH and making a big deal out of nothing?
Edit: Got it, we're both TAH and I need to stop overthinking small things and find friends outside of previous relationships and the internet.