Linguistics is not language learning!
According to the Linguistics page on Wikipedia:
Linguistics is the scientific study of language. The modern-day scientific study of linguistics takes all aspects of language into account — i.e., the cognitive, the social, the cultural, the psychological, the environmental, the biological, the literary, the grammatical, the paleographical, and the structural.
I do learn languages, though; but my interests toward studying them is just much stronger than using them. Just in case you wonder, I use Chinese (Beijing Mandarin & Putonghua), English; and can read very limited Japanese.