My kitten is only 6 weeks old and I only brag her to my house yesterday and she thinks I am her mum now I have no idea what to do? I have already fallen in love with her so I can't take her back now!

So you had no idea how to care for a kitten before you took the responsibility of doing so?

Kittens should stay with their moms for at least 12 weeks. Take her back and let her finish her education on how to use a litter box and how to eat solid food. Otherwise, you will be crippling her for her whole life. Show her you love HER, not yourself.