Ordinary pimples can not be spread through contact with another person.
If, however, you have a pimple that becomes infected with a staph infection (most often caused when you pick at the pimples). A staph infection will manifest itself with pus. (Pimples contain whiteheads which are not the same thing).
If you get a staph infection, then yes, it could possibly spread to another person by direct contact (face to face) But, I would venture to say that this is fairly rare.
Be sure to wash keep your skin clean--

