God you guys are all starfishs.
Here's what you do, you ask her to do stuff together, show interest in her. If she suggest something such as liking a certain movie it means she's hinting towards you to say something, you should then say I'll go with you if you want and so on.
Then if you want to bait her in you ask her to do stuff, one on one. Or in a group at first and always give her the most attention. If she ask for something or leans towards dating or anything like that bait and joke around about it.
Hope that helps.
If you want to do the full on approach just ask her out.