Lol, I am sure you will notice if someone did that XD Believe me, no one can keep a facade like that for long. Besides, the chances of that happening to you are really low. Yeah, be careful with who you talk to, but don't be too paranoid
Just try it. You will find someone, eventually. Just to let you know, though... You might (keyword: might) find people that aren't appealing and/or stupid. Ignore them and move on, don't let them affect your views about the world. There are a lot of nice peeps out there.