There is a very clear answer to this question, which is: Nobody. It's very easy to mistake possessiveness for love, and some people even begin by enjoying this kind of relationship because it can be very intense, and after all everyone likes to feel wanted.
But anyone who acts as if they really own you doesn't love you. If you often think something like: 'I want this person to stay with me more than I want them to be happy - even if staying with me makes them unhappy, I will still try everything to keep them' - you show that you don't love that person. What you are really worried about is your own insecurities, not their happiness.
You may find it helpful to look at this list of signs of a possessive lover. It is very important to understand that nobody owns anyone else and the only person who can really control your life is you.