You're not doing it to make her jealous and you're not pretending you're into her when you're not, so you're doing nothing to lead her on. If she gets jealous, that's her problem.
I really like this girl, and i think she likes me. Her friend looks like she likes me as well, but i don't like her. I want to talk to the girl i like, but i am scared to get her friend jealous and make them not friends?