You dictate the speed at which this goes. Don’t be pressurised into making longer term plans, holidays and such. Enjoy his company on dates. Only do what you feel comfortable with.
Listen very carefully to what he says. The clues are often there as to whether there’s any future. He is already ringing your alarm bells.
IME men do this a lot, go completely over the top (and be aware that he may be playing the field and doing exactly the same with others), fall in and out of love at the drop of a hat. They can be exhausting … and then they cool off just as quickly or want to change you.
The age difference doesn’t have to be a thing. It can make a lot of sense to date younger men for all kinds of practical reasons so long as you have things in common. It can be good too to meet people from other walks of life so long as, if the relationship has legs, they don’t start expecting you to change to fit their life rather than find compromise.
Slowly, slowly …