He does. That is, if hisThe problem with Stan right now is because the friendlier "Let's talk about this..." option is bugged, so we don't know how he reacts on that route. He could react more reasonably there.
_change
variable is active then he's sad but basically accepts what Lena tells him without making a scene. (alternatively, Lena can accept his declaration and it seems they'll be dating down the road)