I agree with Tig, if they can't respect your life and privacy, who said they were being true friends? If you ask me, you should try to find a group of other friends who truly understand you. But my friends goof around with me all the time, so they might just be joking around with you. Or you can ask them why they're doing this to you. But be careful, sometimes asking them too many questions is a bad thing. Be cautious of what you say be and be sure not to hurt their feelings.
Just remember, true friends are found in your heart and soul, and not in a bunch of people who aren't being the kind, respectful friends they should! ^o^