“I need you” can evoke all sorts of response, or none. It can act like a magnet and connect two people or it can drive them apart.
When somebody needs you make sure that you know what they need you for, in that moment. It may be support, and it could be to supply something material. Then again it might be that they just need to feel heard and understood.
Then again it might to feel connected with you…, or to someone or something.
“I need you” can have a thousand meanings. Of course you shouldn’t dismiss it when you hear it, but always remember that before you can respond to it you need to understand what is meant in that particular situation or relationship.