Wow! I guess this might be a cultural thing but to be quite honest I think your attitude is unacceptable. Sure, he asked you out and chose the place but contributing the tip to the meal he was paying for was only fair. Tbh, I think it's very rude not to have offered to have paid your own way in the first place.
Don't you get that you were guilty of what you are accusing him of. He wasn't freeloading off of you by asking you to make a small contribution to the meal you had, but by expecting him to pay for all of your meal you were, in fact, freeloading off of him. I know you didn't intend it as such, but it's kind of hypocritical.
Tbh, the very first thing I thought of when I read that he asked you to pay for the tip, was that he was checking to see if you were the kind of woman who expects him to pay for everything because he was sick of being taken advantage of.