Gia Allemand Had Suicide On Her Mind

Gia Allemand -- the former "Bachelor" contestant who hanged herself this week -- had tweeted about suicide for nearly a year, describing the unbearable pain of being bullied -- something she experienced first hand.

TMZ has poured over Gia's tweets, and we found this:

-- October 11, 2012. Gia re-tweeted, "Words Hurt. Pain Lasts. And suicide last forever." The tweet referenced a 16-year-old Canadian girl -- Amanda Todd -- who hanged herself earlier that year after being bullied.

-- Ocober 13, 2012 Gia tweeted, "BULLYS YOU SUCK RT ... Amanda she committed suicide because of bullying:' ( "

Gia was very sensitive to bullying:

-- October 11, 2011, she tweeted, "As a victim of being bullied most of my life, I'm gonna say that people who can say mean things to other people and put them down are just insecure and depressed with their own life! Glad my momma always told me 'if you don't have something nice to say than don't say it."