Love is crazy shit, that being said, if you've ever experienced it, it's like going on a drug fuelled superbender,
without all of the serious life threatening side effects of one.
However, when the woman who you love to the extent that you feel like you could punch down a mountain, or fight a thousand bears, tells you she was lying to you for over a month of that relationship, meaning in my case nearly half of it, it's like having your balls run over by a train, freakin painful, only not in your balls, but like chest cavity collapsing into a black hole situated in your spine, level shit.
After you experience that, it's really REALLY hard to love again, I know I still haven't loved anyone in that way since, hell I've barely felt anything for anyone since then, so as far as I can see, I got one chance, and it fucked me the hell up, ended in extreme pain, and now I get to live the life of an emotionally jaded individual who can't love, so yeah, be careful with that shit, cuz it may not kill you, but it can turn your heart into a motherfucking gargoyle.
In other words, I don't really believe that it is REQUIRED to be happy persay, but it's one hell of a drug, and anyone who hasn't tried it, should.