Here's my personal opinion..
As much as you love the "lil", it wouldn't be fair to her when you graduate in December..I take it the 1 in 2 months?
You say that you will be staying in the state, but once you graduate, there may be opportunities that you didn't expect.
By taking this girl as your little, aren't ou depriving an active someone of a lil...
Being an alumnae DOESN'T mean you stop caring!!!
This will also allow you more chances to get to know other members as well as you do your current "lils". In the future, this may prevent chances of what are precieved favoritism when it shouldn't be an issue.