so you want to force this faerie to come to you when you call to it because you want to be its friend?
i wouldn't summon a faerie, i would try either meeting this faerie at night, or try welcoming faeries to your home so one might visit. faeries can be nice, but they can also be very spiteful so you might not want to force a fae to do something. try leaving out some milk and honey as an offering [if you have a garden place it there] usually i saw faeries at my old house late in the evening. i don't work much with fae so i don't know when they're out more, but if they're usually out at night, try figuring out a night where you could sleep over at your friends and she could introduce you. [keep in mind you may not physically see the faerie, it might be an orb out of the corner of your eye, or a feeling of its presence]