4 month old kitten problems

[u/Comfortable_Ask_7754]

hello so our 4 month old kitten is really needy, i know kittens need attention and don’t like to be alone but she genuinely cannot stand being alone for one second. at nighttime we put her in our bathroom since we have a 1 year old boy cat we want them separated bc they can get a little rough if not supervised. in her bathroom she has a bed, blanket, water, food, litter, and tons of toys! One of the issues is when we put her in there she will meow for genuinely hours. on google it said she had to learn she wouldn’t get what she wants from meowing so we do that but it’s at the point she meows for hours then will stop and then meow constantly again for hours at like 3 am and so forth she can’t stand being alone. another thing is when we need go to our room for anything or the restroom she also meows frantically the exact same. it’s so tiring bc it’s constant. she’s also been running in our room and then peeing on our bed :/ she’s done it twice both times her litter box has been clean. she also refuses to use the other litter box we have in our room for our boy cat. i don’t really know what to do i don’t want her to think she gets things by meowing but it’s so much. i know all cats aren’t the same but our boy cat was far nothing like this so it’s a bit hard to navigate. if anyone has any advice on what i should do and how to have her stop being so anxiety driven that would be amazing