Firstly don't rub her nose in it - it doesn't do anything other than make your kitten wary of you - secondly you need towash your covers, sheets, quilt and mattress with something designed to get cat pee smell out - she will be able to smell where it is long after you can't. You can buy 'simple solution' from pets@home, alternatively use non-biological washing powder and then sprinkle on bi-carbonate of soda after. Once she has been somewhere once (even as an accident) the smell will encourage her to go there again unless you get rid of all traces of the smell.
She may have a urine infection and not be able to control herself enough to get to the litter tray - take her to the vets to check this out. SHe is still really small and maybe the space you have her in at night is too large and she can't remember where the tray is. The appeasrance of your boyfriend may have stressed her a little and that in young kittens can lead to regression of toileting habits.
Personally I would put her in the kitchen or another small space at night with food, plenty of water (don't restrict her intake - it won't stop her peeing, will concentrate her utrine making it much more smelly and could cause kidney problems in later life), toys, litter tray and bed - then sh won't hve access to your bed to pee on, nor will your possible night time activities with your boyfriend a) stress her or b) make her want to play with tender areas as they come in reach! Nothing like stopping the romantic passion as a cat sinks it's claws in a bare area of derreirre thinking it is a game for its benefit!
Keep trying - she will get there - it isn't personal.
As for being vocal, some cats just are that way - they like to talk to you lots. Remeber she is still very small and will be missing her mumand brothers and sisters - she's probably a bit lonely. Cuddle her lots and reassure her.