How do I balance out this friendship?

I’ve just made friends with another North American who is traveling in Paris this summer. We hit it off really well and have hung out about five times in the past couple of weeks.

I’ve been developing an inferiority complex, however, because I am at the end of my means here, I can’t even buy drinks anymore, and he just arrived here and is spending money like a drunken sailor. He’s 10 years older than me and has a good job and genuinely seems to enjoy treating me, but it’s still making me feel bad. He’s bought me dinner (and I have never even eaten out at a restaurant here because I’m on such a tight budget) and countless drinks.

I know that friendship is more important than money, but at the same time, I really like to share as well, I am used to buying my friends drinks, treating them sometimes (or at least being able to split a restaurant tab!) etc., and I was wondering what I should do, if anything, to let him know how much I appreciate this. My only thought is giving him a standing invitation to visit me back home in the States, and I’ll put him up and take care of his food and drink, but my area’s not exactly a tourist destination, haha.

Any thoughts or suggestions would be much appreciated.