I agree writing a no send letter is a good idea. I agree it's hard to get the abuser to acknowledge abuse because if they were sympathetic people, they wouldn't abuse you in the 1st place. I also heard of the 'empty chair' in therapy where you pretend your abuser is in the chair and listening - and you say how you really feel. But I don't recommend trying this without a therapist - it could be upsetting, but it would offer relief. I also think some abusers might feel remorseful but are either scared or too embarrassed to participate in the conversation.

When I'm really feeling very frustrated with someone and I can't find a solution or they're not cooperative - I just think to myself they'll feel my pain one day. I think when we die God will make us feel the pain(significant) we've caused others. Or I also believe in Karma too. When I'm feeling very bothered I like to say the Serenity Prayer -I'm not a practicing religious person, but this prayer comforts me a lot.