I am exactly the same, but it only appears to be with my dad and my boyfriends at the time! Which is ironic, because it was my mum who left me and rejected me, yet, i never am like that with my girl-friends.
My dad - We have a rock relationship, if he doesn't jump when I ask him to I hate him, if he doesn't answer the phone when i want to, i hate him, when he doesn't come to see me, i hate him. I don't give him any room to make mistakes. I text him, tell him i hate him, that he has ruined my life, that i don't want him, the next day, i love you, please don't leave me.
Boyfriends - I have allowed boyfriends to use me, reject me and ridicule me. The first boyfriend, we finished mutually but there was no going back because he wasn't interested, though having said that we did have a bit of no strings going on. The second boyfriend, well, he was the greatest, true i hated him when he was late or didn't text me, we remain friends though i have laways tried getting back with him, funny, the bpd traits of me didn't really enter that relationship. Third man - one night stand, i continued to text him even fter he told mehe wasn't intereested. The fourth one, well, he got me pregnant and i truly did hate him, but then i loved him on other days. Barmy aye. On the days i loved him, there was nothing wrong with him, he made me laugh (yet everynight when he left me to go home to his girlfriend i use to drink myself to sleep) so, yep very black and white!
