They are just some examples, each one is a little different. I interpreted this sentence to mean that someone is too absorbed in a single term/concept (X) that he/she cannot think outside the box or independently about anything else.

you seem to be [too fixated on] X. Please forget that word.

you are too [wrapped up in] X

it seems that you are [preoccupied with] the term/concept of X.

you seem to be too affected by X