 In Smallville , Lana is the love interest for Clark Kent , though , in the first season she is dating Whitney Fordman . By season two , with Whitney 's departure , Lana and Clark begin to grow closer . Clark 's dishonesty over the secrets he is hiding causes their relationship to end . Lana then grew closer to Lex Luthor . Eventually , Lana learns the truth about Clark and they get back together . After stealing a kryptonite @-@ powered suit from Lex , Lana absorbs an enormous amount of kryptonite radiation , which prohibits her from getting too close to Clark , and she leaves Smallville for good , but vowed to continue to use her powers to preserve life . 
