Most Helpful Guys
need you... it means that he need your attention, friendship or conversation. As for me, it is the first step to your future relationship
"I need you" means that they need you in their life.. You give them something that they feel gets them through the day sometimes.. He could have meant you wanted to be with you too.. LOL..
Most Helpful Girls
Well I need you can mean various things. You made a good point in your detail the difference between needing and wanting someone however people tend to abuse the word "need".
Like you said need can mean it's original meaning to rely on someone in a mental, physical, spiritual, or emotional context. But unfortunately as I mentioned before people may say need when they really mean want.
The only real way to tell is judging the statement. Think about who's telling you this and what are their motives. What's your relationship like? What are previous and following sentences? And it'll be pretty plain to see if they meant "need" or "want".
When someone says "I need you" then you are part of the daily structure of their lives. You provide emotional support that maintains their mental well being and they feel safe with you. We all need at least one pet, human that helps us maintain center. To be needed means that you have more value than you could ever fathom.