Needing something or someone results in different behaviors than when you really love them. When people are possessive, they are trying to resist change. They are trying to keep things as they are and, by doing so, are creating an artificial reality of life. They focus their time and energy on being loved rather than sharing love. It becomes a burden and stops us from loving ourselves.
People end up destroying the object of their possessiveness and themselves in the process.
Try to give yourself what you need from the other person or from that material object. It is important to let the people and things you love be. Most of all, don't expect them to fill your needs. The less possessive a person is, the more loved they are. The less people need others, the more loved they will be.