right or wrong?

in light of all the strangely related news all over around me recently..

so what do you do when you're torn between encouraging your friend, and telling him/her the more probable truth?
what do you do when you cant bear to discourage your friend, who is very happy doing something that you feel is wrong?
and what do you do when you see a friend suffering while fighting for what he/she wants?

most of the time, i choose to encourage them cos i want them to be happy, and then blame myself for not discouraging them when things get bad.

..
but ill never forget the time when a loved one of mine was broken hearted. it made me really hate a person whom i never even met before.

since then i always believed that in love, and in life:
1. if you don't like someone, then don't mislead him/her. we are descendents of Adam and Eve so there's always something called instinct. "i didn't know" or "i didn't see it coming" are just excuses.

2. dont make use of others, that's disgusting.

3. think responsibly..cos what you do now will always affect your future somehow.

anyway i just don't like people to get hurt. but these are just my thoughtsl, i shouldn't criticize others' decisions cos i have no right to do so. quite thankful that i don't usually say it outright and upfront..

i guess its difficult to really accept there's no right or wrong in this world?