Next time you go out on a date and you agree to meet up at some place, go to a nearby place where you can see her but she can't see you. Stand there for a while until she's almost about to leave and then show up. Don't say you're sorry. This will make her value you more. You're important and she needs you no matter how late you are.
If you're in a group, don't stand next to her.. Just go lean against a wall and take out your mobile phone and text something. You're not needy. She is needy. She will come TO YOU.
Don't tell her you need her. Tell her you want to spend time with her, when she suggests a date say you're busy. When you feel like it, call her and tell her to come be with you "right now!". Be pissed if she doesn't. She will come.
If she comes over your house for dinner and you're alone, make sure you only have the one drink she hates the most. Make her drink tap water. When she whines about it say you'll make it up for her with some great sex. Get some.
(I so did not do any of these.. get it..)