and, those yoga instructors? nine out of ten know the game they're playing. get them out behind the studio, smoke a joint with them, and they'll tell you it's just all a lot of bullshit and they know it, but it pays the rent and gets them laid, so why not go with it?
but, to the guy that's asking the question: she likes older guys. it's not at all uncommon. there's lots of reasons. experience. money. other, creepier things. once, it's a thrill. over months? continually? she's thinking about moving in, at the time. doesn't matter if he's married. it's instant everything, including instant adulthood, and that's key. no period of struggle - just a red carpet to financial freedom. a house. a car. and, listen: why not? why go through the difficulty of sticking with some 20 year-old that could flunk out of college next week, when you can get a guy with a nest egg? it's entirely rational, which is why it's not uncommon.
what that means is that she's waiting you out. she's thinking you have a path to wealth; if you do, it probably works out. if you don't, she's going to drop you in a second to find that guy in his mid-life crisis that'll treat her like a princess for long enough to get some cash out of him.
you're 22. world's rough. deal with it.