>>11
What? Why do you need permission to use a phone number? Are you 12?
As much as you want to hear her honey-dripping voice, some random professing his love over the phone WILL freak her out.
But here's an idea, take advantage of your links with your cousin. Get them to drop a hint to the girl that you like her.
"Hey, how's the party?" Was an example. Use your own imagination. I'm giving advice, not a script.