Love is a feeling you get when someone or something brings you pleasure or joy, happiness, and an overall positive "warm" feeling.
You could love your favorite slippers, blanket, or coffee cup. You have an attachment to it because when it is near to you, you feel safe, secure, and sometimes all warm and fuzzy.
You could love a type of food. Again, the memories and/or feelings it brings you causes a good feeling.
TRUE LOVE ~ that's unconditional. That's a feeling only felt for another living being. Your pet, your husband, your child, your parent, sibling, best friend....
True love is when even if the positive feelings which attracted you to that person are interrupted, you still care for them. You generally put their needs before your own. You think of them more than yourself. You want them to be happy, healthy, and taken care of.
Even if it means you aren't in the picture. Even if they hurt you. Even if they do things that you would never allow another person to put you through. Even if they do things that you would disown another person for ~ you still love them.
Like when a child commits a horrible crime. The parent still loves that child. Because the love is true.