How do i get her on a date? I didn't get a number but we r fb friends?

[979]

So i met this girl at a party at my house, she was way into me when i was talking to her, she kept getting real close and would pull my arm around her waist, things like that. I invited her to go for a ride on my motorcycle, just a slow cruise around the block, we had a good ride, i stopped for a minute to chat, while sitting on the bike still, we kissed and then rode back.

When we got back she sat on the couch, i had to go for a beer run, got back and sat with her, after the guy she was sitting next to stood up to grab a beer she pulled me into his spot next to her, another good sign

we talked a little, i invited her up to my room, for more 'privacy', she would say no, so i figured thats fine -- everyone has a pace they are comfortable with -- . We talked more, she asked for my phone to find her on fb and the party was kinda dying, thats when her girl friends wanted to leave, and we kissed a last time and she left.

my question is how should i go from here? should i get her number from fb then ask her out? or ask on fb?

with this girl i would like her to be a gf not a one night stand