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

My family adopted two young cats about 3-4 years ago. Of these two, one was particularly shy but eventually warmed up to me, and me alone. This cat and I are now really close, to the point that she is simply known as "my cat." So for the past 3 or so years, she has slept in the same bed with me (actually refusing to go to bed unless I'm in it first), she follows me literally everywhere I go in my house unless she is napping, and actively avoids everybody else in my house if she can.
I live in a divided family, so every once in a while I'll spend a week at my  mother's house. During this time, my dad notes that my cat just stays in my room and sleeps on my bed most of the time, and sometimes walks around and just meows. When I eventually return, she gets super stoked and basically demands my attention for the rest of the day. 
This has never really been much of an issue, because my visits are few and far between and I'm never gone long enough for my cat to get too upset. But I'm now a high school senior, so starting next fall I'm going to be going to college full-time and may not be able to visit home very often. I'm afraid this may seriously traumatize my cat, especially considering that she doesn't really want anything to do with the other people in my house. 
I really need some advice on what to do, because the last thing I want in this world is for my cat to be depressed for the next few years.
<bot>: My cat and I are extremely close, she hates everybody else in my house, and I have to leave for college full-time with few visits. Please help.