He's DEPRESSED because he's pathetic
and creepy and can't get girls.
The Big Bang Theory Season 2, Episode 12
...because I'm fun,
I'm not clinically DEPRESSED at all.
The Big Bang Theory Season 6, Episode 5
Honestly, I get so DEPRESSED,
there are entire weeks
The Big Bang Theory Season 7, Episode 19
Well, not so much DEPRESSED
as lonely.
The Big Bang Theory Season 4, Episode 22
...green is jealous
and blue is DEPRESSED.
The Big Bang Theory Season 4, Episode 22