Ooh, that's really tough. I honestly don't know how to help, I'm more so lending the support of 'I know how that is'. I told my two best friends, but I currently am close to having a boyfriend.... And I Don't think I'm going to tell him. My reasoning is that relationships (I'm a high school student, by the way) don't last long at this age and could end up very ugly, so to save the tragedy that could ensue, I don't want to say anything.
I don't know if this will help answer your question or not, but there you go.
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~ Fortune favors the brave ~