If you're looking to have more privacy in your life, you simply have to ask for it. People are so excited about the idea of spending more time with you that they are not going to pick up on the subtle hints you've been laying down. So if someone asks to hang out with you today, don't hem and haw or tell them 'I'm not sure.' Go ahead and own your time -- tell them 'sorry, no.' You don't have to give them an excuse -- your time is yours to do with what you will.