Master and the Sub

I want to ask this question what is love? Is it a feeling an emotion or both.  How does one register what love is to them, I have seen people that equate love with objects, money, status. You don't love me because fill in the blank as to what they want or need, do we associate love with certain feelings, emotions, or the way we're treated? Is being faithful, respectful, honest, kind, and caring a reason to love someone or to be loved is there a physical or emotional reaction that is supposed to happen when we love or are loved? Some associate sex as love you don't love me because you're not getting it on the schedule you want. What determines love for us can only be determined by us, I believe it's different for everyone not an all around experience felt by all. With that I will explain why I asked this question, ever since I was a child I have never had a reaction to hearing the words I love you for me it's like hearing have a good day. It's a nice sentiment but I don't feel my heart strings being pulled. Please understand I love with every fiber of my being to those that I care about some more than others but I can't seem to feel it when it's told to me. I know that I'm loved but I wonder if something is broken with me, I feel fear of losing the ones I love, sadness if I lose them I can't imagine my life without my beautiful lioness and I pray every day that she knows how much I love her. I know she loves me by the way she treats me and that she tells me every day how much she loves me. I just want to know what am I supposed to feel when someone tells me they love me, the thought of ever losing her brings fear to me is that how I know I'm loved? From inside my own feelings and emotions I associate love with trust, loyalty, respect, caring, kindness every thing my beautiful lioness is and so much more. I know that from our past that it sometimes dictates what we determine love is for us in the future when finding someone who will either guard our heart or rip it to pieces. I am learning everyday how to reconnect my feelings with my heart so I may feel the same way she does when I tell her that I love her. I want to know what that feels like, to my beautiful lioness as you are now sleeping know in your heart how much I love you now and forever.