I agree with this, and I think it might be even worse if you're the introvert. How many times have you been out together? Is this a romantic situation - I mean it sounds like you have romantic feelings but does she understand it that way as well, or are you like hanging out with friends? Are you in pursuit or actually dating? There are lots of non-socionic reasons why you could be having these kinds of feelings as they are very common for any people when they're pursuing someone they're interested in.