My friend,j, was in a 3 year long relationship with k her ex. In those 3 years he has blackmailed her, emotionally manipulated her and gave her fake blackmail threats.

She managed to block him for a while and he has come back crying and apologizing to her.

She's now considering getting back together with him because she's still love with him.

He hasn't physically abused her yet. His life sucks to be truthful, he's broke, he hates his family and she's the only good thing In his life apparently.

So how do I convince her that she should not get back together with him

Tl dr: friend wants to get back with abusive ex. I would like to stop that.

Update: she blocked me. I learnt a lesson the hardway and u guys are right I should look after myself.