Reading all of these makes me agree STRONGLY with two:
"Get over it"
"You're too sensitive."
I've had "get over it" used in ways that were deliberatly trying to make me feel guilty for feeling bad- and it worked until I realized the person who was doing it had so many issues, and it was her way of not dealing with them. Now I just wish she'd get help. And I don't talk to her unless I don't have a choice. (fiance's twin brother's GF, and fiance's twin brother happens to be the person I'm second most close to in the world.... fortunatly she's a long distance GF, so she's blocked on my instant messenger).
Another time, it was used by a friend who kept REPEATING it as I cried...
And a last one- anyone trying to convert me. I don't care WHAT religion you are, if I give you a polite refusal, and you KEEP doing it, you will loose my friendship. I lost a friendship (in 6th grade!) over this one. Would have lost another if the person had backed off any later.