<p>Basically you’re wondering if Harvard has some sort of school quota, and if so, will it diminish you chances. Fact is you’ll be admitted regardless if your friend were at your HS or not. If you get it, it won’t be despite him. If you get rejected, it won’t be because of him.</p>
<p>H has no need to have limits/quotas of admits per HS. That would imply they felt some need to “spread the wealth” to other high schools. They don’t. They will admit/reject whom they want regardless of the school. They aren’t there to curry favor with school administrators. They’ll look out for their own needs first. They could admit both of you and none for the next ten years – if the quality of the candidates dictated as much. Or they could reject both of you and accept five next year – if the quality dictated as much.</p>
<p>Good luck to both of you.</p>