<human>: Can you give me the gist of the text in a nutshell?

The situation: I have just moved to a new apartment and my cat is causing me problems while sleeping due to scratching and "yelling" at night. She has always scratched surfaces but had been locked out of my room at night before so it never bothered me. I had talked to a woman I know who raises animals and she said it might help if I got another cat for her to play with. Following this advice, I went to the nearest shelter and absolutely fell in love with a cat there. However when I started to do some research, I found out that my cat may not be as happy with another animal in the house. She's a fairly timid cat that has been an only cat since she was a kitten and I got her from the same shelter. She tended to make friends with outdoor cats through the door at my old place, even rarely dashing out to sniff them and say hello when we opened the door but was very defensive if we let the outside cat come in and play. The cat I'm looking at is also a very calm, sweet, and affectionate sort of cat but is much larger and about a year older than my current cat. Basically I'm wondering if anyone has any insight into whether or not getting this animal will have a negative or positive effect on my cat's life because I don't want to lower her enjoyment for the sake of having another animal.
<bot>: Have current cat that is acting very bratty because we just moved and trying to figure out whether or not to get another cat.