How can I persuade my dad to let me have a facebook?

I'm 13 make good grades and everything, my mom is totally ok w/ me having a Facebook. But my dad is over protective and stuff I had one last year but my dad didn't know but he deleted it, but it's been a year and some months. I asked him last week instead of saying no he said I'll think about it. Then he start asking me questions lke will i have your password and will u add ppl u don't know, and I answered them all responsibly, what should I do.