How do you get rid of your orbiters when you are getting into a serious relationship?

I am certainly not close to a serious relationship, but I'm thinking about my last one. Examples.. the the random girls that I can call anytime to come over, the girls I slept with overseas that we still keep in touch, the girls on the other side of the country that send me sex messages, the girls you haven't slept with but know you could, what do you do when you are getting serious with someone? Do you block everyone? Do you tell them you are dating someone? Thoughts?

How do you get rid of your orbiters when you are getting into a serious relationship?
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