I would wait a while until you believe a guy could possibly be "the one" and you know he truly cares about you and if he truly is.. then he would love you just the same. Plus, if you make them wait a while for sex and they decide not to date you because they haven't gotten any.. they'd be the one to just leave anyway, plus you saved the whole having to tell them bit.
I am not going to be much help I found out last month I havent dated any one since but i did tell this guy who wanted to start a relationship with me i told him and he said we could still hang out like we used to he said this two weeks ago I havent heard from him since.You tell me good or bad