On your phone, go to the Contacts List. Next, select Menu. Next, select View. You should now see a list of all the different types of contact lists that you have on your phone. You should see Facebook For HTC Sense and possibly also just "Facebook". If there is a checkmark next to either one of these, you need to uncheck these options. Now you should no longer see your entire list of Facebook friends listed under Contacts. Hope this helps.