I dont know if it is like "getting addicted to heroin"..Ive had alot of thoughts throughout my life..But addicted to heroin is having to chase and shoot all day and cant hold a job or support yourself as far as the addiction and shame.
Thoughts of suicide are a comfort to some while deciding whether they want to keep going in this rat race or not..I know people are compulsive and know the dangers of fucking up.
I would say suicidal tendencies are not the same as heroin addiction,but understand wanting to prolong life in getting a high for one more day.SI can be a bitch,as well as reality.
So many cases vary,some seem way worse than others..Think we can all agree life is hard.