"I told him to pretend to be happy anyway. Oh, the irony. I probably should have been the better person and been sympathetic, but it was too good of an opportunity to pass up. "

LOL That was a good one. I have even read."just pretend to be happy" on another site. It is just amazing. Like Dexter said above, you don't tell a diabetic or someone with a broken leg to snap out of it.
In fact I don't think I can improve on his post..so I may use some of his ideas when someone else tells me yet again to just "feel better".