I'm assuming that you want to know the meaning of this phrase. too highly = 太/太過 involved = 參與/（但是在這也許‘投入’比較適合） you are too highly involved = 你太過投入。。。

Are you talking about work or a person?

Hello Tony, If you are involved in a situation or activity, you are taking part in it or have a strong connection with it and you give a lot of time, effort, or attention to it. 'highly' means very or extremely. If you write more of the paragraph,where you read this sentence, I could help you understand it more precisely.

of what? please make it clear thanks cowboy...