Lauren Conrad wore two different bikinis over the weekend to hang out by the pool of her Cabo resort alongside her boyfriend, William Tell. The couple arrived in Mexico earlier in the week and were ready to slip into their swimsuits to swim, get drinks, and dive into their books. William, a law student at the University of Southern California, was deep into one of James Bond author Ian Fleming's novels. Lauren Conrad and William Tell have been dating for a few months, having first been romantically linked back in February. Things seem to be going great between the couple, since they were seen showing PDA in the pool one afternoon. Lauren was certainly in a beachy state of mind, as she tweeted Friday, "Salt in the air, sand in my hair..."