What would you think of a 16 year old dating a 20 year old?

I'm a 16 year old female. He's a 20 year old male. We met during a CPR course last week. I thought he was 17/18 at first, likewise he thought the same for me. Despite our age difference, we flirted and he asked me out to the movies this weekend. He's a sweet and funny guy, and I don't get any "creepy" vibes from him.

Am I being naive reddit? Can a 16 year old and a 20 year old date or should I just end it? Also, age of consent is 16 in my country, so there's no problem legally.