Only A Fairy Tale??

So I've been thinking a lot about the difference between loving someone and needing them, and I have decided that they are very different in many ways. A lot of examples have come to mind, and after much thought, on the subject, I have to conclude that relationships aren't as simple as I once thought. For example, wanting to spend your life with someone involves considering what needs are best for them along with your own needs. This can be a very complex situation, one that usually involves putting the other person's needs before your own. This is where the love comes into play, because this selflessness can only come when you truly love that other person unconditionally and would give the world for them. With this idea in mind, I can't help but feel somewhat depressed, because I don't know of anyone who could love me that much. It seems almost naive to hope for that...