i have two kitties now.
Not too long ago, i was hired by a bank to work in the business development arena. That was when i decided to adopt another kitty - to keey Daisy company. By the way, i quit very shortly after i worked as i did not enjoy the work politics.
i wanted to adopt another kitty to keep Daisy company in my absence. So, i started doing some research work. i concluded that it was best that i adopt a KITTEN instead of another adult cat. This way, Daisy would not see the new kitty as a threat, and would take her in her arms more readily.
i adopted Venus when she was 4 months old. They have been getting along splendidly. In fact, they have been on friendly terms since day one. They don't fight over food or toys. They also seem to take turns to sleep at the penthouse. Many times, i caught them licking and grooming each other (often leads to play/friendly fight sessions.)
Sometimes, they would sleep together as well.
So, from my past readings and personal experience, i would strongly recommending adopting a kitten as opposed to an adult cat. i am sure Pixel will be happy to have the pleasurable company of another kitty, to play with, eat with, etc, etc.
i doubt seriously that Pixel will love you any less with another kitty around. Whenever i return home from running my errands or an outing, the minute i open my door, i will see DAISY greeting me, ready to jump in my arms. The moment i stroke her, she would purr and purr away. Venus is deaf, so she can't hear my entrance, and is usually sleeping or playing.
So, your worries about getting less attention from Pixel, i feel, is unfounded.
Hope you WILL get another
kitty (what about rescue centers?)!