I would think this is one of the most difficult things a Catholic can do, to tell the truth to non-Catholic family members and friends whom one had good ties/relations and got along with, because they were your close friends and you shared so much with them and they still think good of you and like you etc. and no matter how much prudence and tact you use, and no matter how "nicely" you say it, in most cases, it will go bad and they will end up hating you and thinking very badly about you etc. Things will get uncomfortable and inconvenient.

Telling the truth to enemies and people who already don't like you, even if they're family members, or to strangers, isn't hard because you never had good relations/ties with them anyways.

I feel very bad because i feel like a total hypocrite because there are still many of my family and friends who don't know where i stand now and they wouldn't be nice to me if they did. They still think i am like i was before. I avoid them as much as i can but there's always that unavoidable or random occasion where you just bump into them and you are forced to speak to them. It is very painful to speak to them because i do want to tell them the truth, because i care about them, but so far i have been a coward and haven't said anything.

Another bad thing about this is that I also sin in these encounters because they usually say bad words and things and all i do is smile it off, giving them the impression all is well, while on the inside I'm boiling because i want to tell them something. They are also a waste of time these talks, and i would prefer to speak of things of substance but my cowardice stops me.

I suppose i will have to man up and do this eventually, because i can't stand being hypocritical anymore.

All i think about when i think about these things are passages like:

If the world hate you, know ye, that it hath hated me before you. [19] If you had been of the world, the world would love its own: but because you are not of the world, but I have chosen you out of the world, therefore the world hateth you. [20] Remember my word that I said to you: The servant is not greater than his master. If they have persecuted me, they will also persecute you. John 15:18-20

For do I now persuade men, or God? Or do I seek to please men? If I yet pleased men, I should not be the servant of Christ. Galatians 1:10

Does anyone have any episodes to share where he/she had to stand up and speak the truth and was afterwards persecuted and hated by family and friends?

Cardinal Manning was a convert from the Anglican.  Many converts came about from his sermons and lectures.  He was the big push to get Papal Infallibility dogma, before war broke out.  When you read his lectures on the Anti-Christ you will see how he spoke.  He had sadness for those who were not of the True Faith.  He said, for over 300 years many isms came about and you have lost your heritage, he told the non-catholics.  Oh, how sad, that you miss out on Heaven.

He explains Rationalism.  Very good reading.  check out what may be on line.