Love and care are sometimes hard to define because people say that you will know when you love a person when you also care about the person. They may go hand in hand with each other. Love is usually stronger, though. The feeling that you will experience is unlike any other that you have felt before, so you will immediately know that what you are feeling is love.
You can care for someone without loving someone or being in love with someone. For example, you may care for the welfare of the elderly that you are helping, but it does not mean that you have strong feelings of love for them.