That is a really different sign for that. I think it might meant I love or I like hopefully (like crossing your fingers). There is no you on it at all. Why would a young girl want a tattoo for this? It is definitely not ASL. (shaking my head)
We use that sign for "I Really Love You." That's all that I've ever seen it used for.
It might be easier to understand if you first form the "ILY" sign with your hand, hold it, then change the index finger into the R. See how the "ILY" becomes "I Really Love You."