This one fits Linda because

She (secretly) feels pressured that she has to be the perfect friend that everyone knows, the one that is always there to help with her telepathy. She doesn't like her gift most of the time, because usually it would drive one crazy. She's sinking underneath the "expectations" that she thinks her friends have, and she's trying to be the one who's perfect.

But she knows she can't, and dislikes that. She wants to meet the expectations of her friends, not just because she'll feel better, but also because she wants to make her friends feel better too. When she shows them that she's always there for them, always telling them that they can turn to her when they are having nightmare or thought troubles, she thinks that they are satisfied with her, so she's always pushing herself to the limit. 

She just wants to be normal most of the time, which is another way you can look at the song. If you look at it this way, imagine that she's fantasizing that she's a normal, perfect human being. She hates her powers until they come in handy, but when they aren't needed, she wishes she could throw them away to be normal. She wants to live a normal life, though she isn't sure with who. 

She wants to be normal so she can live a normal, perfect life. 

Let's just say that Linda is insecure about herself, how she keeps telling herself that she has to meet the expectations that she thinks her friends have for her. She just wants to be perfect for them, perfectly normal.