one young woman loves her job but is going to move to another state away from her family so her boyfriend can get his new job...
A "stud" has no incentive to marry, if his current girlfriend can be easily replaced by a younger/hotter one at the point that she becomes too annoying about wanting commitment.
Meanwhile, the young woman has been rejecting the "nice" young men who WOULD have married her in her 20's until she's finally in her 30's and desperate. But by that time, the good men are already taken, and the ones available either have issues, or are bitter divorced men.
In the old "patriarchy" days, fathers would have made sure that studly cads with no intention of marriage never even got to talk to their daughters.