The relationship between Clark Kent and Lana Lang was one of the most dramatic relationships in the series.
However, due to her traumatic relationship with Lex Luthor, they had to face the fact that Lana was no longer the girl that Clark originally fell in love with.
Despite attempts to patch up their relationship, Lana eventually decided to leave town, telling Clark that the world needed him more than she did.
Clark was afraid of Lana's reaction to his secret, as he felt guilty that Lana's parents had died in the 1989 meteor shower.
He faced his worst nightmare when Luthor Corp accidentally released a dangerous toxin into the air, causing Clark to hallucinate that Lana had discovered his secret and wanted vengeance for her parents' death, killing him with a piece of kryptonite.
This made Clark more convinced than ever that he could not tell Lana the truth, especially as she had stated several times that she was fearful of people with superhuman powers.
To maintain his secret, Clark constantly lied to Lana, driving a wedge between them.Clark was not only doing this for selfish reasons, as he also believed that his secret would put her in danger, especially as Pete Ross claimed that it had ruined his life.Despite Clark's attempts to maintain his secret, Lana became suspicious, particularly when she had vivid memories of Clark's face as she was pulled into a tornado.This bothered Lana for a long time, as she even pondered what had really happened five years later.Lana directly questioned Clark about this, but he brushed it off.Unconvinced, Lana later tried to reassure Clark that she would not be bothered if he was different.