Lots of people feel that way. Could there be something particular that makes you feel like that? For example, do you have a positive self-image? Do you consider yourself smart and sociable? Usually there's something there that triggers the paranoia. If you can figure out what it is you can overcome it, either by realizing it's trivial or taking measures to correct the problem.

This whole situation is retarded. Instead of getting yourself into a love triangle, you have somehow managed to create a "love square"?!?!??!!

.., there's no reason to think about anything.., if you're "thinking" you're losing.., just "do".., because nothing is a big deal.., unless you make it out to be..