It makes sense that you’re interested in him because you’re all single, about the same age, and you and your friend both have relationships with him — even though yours is a secret one. It would be understandable if you were interested in him, too. Why not be honest with your friend and tell her that you feel obsessed with this guy and you’re wondering if you have a crush on him, too! It will give her a chance to tell you that she understands or she’s mad or threatened or she wants you to go for it because she’s not having much success — whatever her response is, if you keep this obsession secret from her, your relationship with your friend won’t grow. Besides, if does feel a little jealous, she may think twice about asking you to “be her” next time around and that would be a good thing, so she can overcome her shyness and approach guys on her own. 😉