We all have needs in life. When you express those needs by email over and over again, it makes you look needy. I "need" you to come to work early, I "need" you to get that report done. Avoid saying "need" and express requirements more directly.
I need to buy expensive suits before I go to any job interview.
I need to be sure there is no risk of getting turned down before I ask her out.
Need acts like a stalling tactic and a justification for failing. It's also a dream stopper. It's you setting up conditions—which are often unnecessary—for you to succeed. It’s better to try and fail, than to fail to try. The experience of engaging in an action or a relationship is far more important than the result. When you are not too attached to the results, you actually don't need much to start.