Death

Alicia gets snubbed at The Talon.Back together, Clark took Alicia to The Talon on karaoke night. Everyone stopped and stared and Lana was hurt that Clark would date her after she tried to kill her. Alicia asked Lana to give her another chance, but Lana walked away.
Chloe sees Clark use his powers.When Lana was later attacked by an invisible predator, everybody believed it to be Alicia. Clark defended her and claimed she was with him at the time of the attack and that she was wearing her lead bracelet.
He later discovered that she has, in fact, stopped wearing it, saying she didn't think...

I can see how strong you are, then for some stupid reason, you retreat into this 'hurt little girl' façade." – Adam Knight, Delete

The death of her parents when she was three
was very influential in shaping Lana's personality. Despite the fact that her aunt raised and cared for her, Lana has felt like an abandoned orphan her whole life and idolizes her dead parents. She often states that she feels isolated and out of place and dreams about leaving Smallville forever for something more. Despite this, Lana developed a reputation for being a sweet girl – pleasant, caring, and eager to help...