I don't think there's anything wrong with you taking a little so long as you don't give her special treatment until *after* she's initiated.
If you wait, you might have a little that feels like you didn't really want to be her big, which is how I feel. My big chose me because I wanted someone older than me, and she came up with first pledge class. She didn't really want me to be her little at first for reasons that need not be mentioned here (it's a long, confusing story and I'd rather not stay resentful), and I feel like she is pretty much abandoning me since she graduates in December (I initiated this spring) AND since she's gone social this semester. If you wait, your little might think "I'm only her little because she FINALLY got to have one, etc."
I say take a little. If you can put in the time and be a good big, your little will love you all the more. And if the rest of the pledge feels bitter or jealous, just explain that you love them all, but you really wanted a little. True sisters would understand.
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