There seems to be some truth to "Men marry down, women marry up." She's not likely to marry "down" because she thinks her own snooty crowd will make fun of her. If she wants a man, all she needs to do is go get one. But she can't rid herself from her own image of "success." She's trapped, she doomed, and her biological clock is ringing so loud it's keeping the neighbors awake.
It's not that "men marry down" as much as men have different search criteria. Men look for a woman who is
Many women place a high value on "somebody with high enough status that my circle of friends will be envious". A lot of women see their status being determined by the status of the guy they're going out with. For high-earning professional women, the pool of available guys that meet the "status" criteria is small. The pool of guys who don't have better options is even smaller