When a girl follows you on instagram, do you think she likes you?

We're kind of friends, he's friends with my brother. We're kind of in a flirtationship, more than a friendship less than a relationship. But if I follow him, do you think he'll think I like him? I don't want to seem desperate. He flirts with me (I think it's flirting) a lot more than I do with him. I'm pretty (I think) so how can I really attract him do you think? But he has a gf. :\
When a girl follows you on instagram, do you think she likes you?
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