Hopey - It's not surprising that they are not getting on!! HA HA HA HA HA HA HA Idiot that he is.
Within weeks of seeing this 19 year old, she moves into his 1 bedroomed flat where his baby daughter also stays when he sees her!! She's probably totally freaked out. She'll see sense and bugger off soon, leaving him looking more of a prat than he does at the moment.
I think you should tell him straight that you DO NOT want your dd staying there whilst the new bird is dossing with him!!! Have you spoken to a solicitor coz I think you might have legal rights here regarding his 'living arrangements being unsuitable'...not sure though.
And to hear that they are not getting along.... BONUS!!!!!!!!!!! But that is also a reason why you don't want dd around there. She doesn't want to visit Daddy, only to witness him and his new girlfriend rip out each others throats!! Maybe his visits should be limited to day visits rather than stayovers. He needs to realise that dd needs loads of stability and he needs to calm down!
Try not to get too hung up on their relationship though, coz it may hinder the healing process. In saying that, you do seem to be doing really well!!! Keep going the way you are and you'll be feeling great in no time.
You should let him read this thread just as an extra bit of humiliation when he reads what strangers think of him and his 'pre-midlife crisis'!
It's a shame you couldn't broadcast his name without giving away your own identity.