Not by words but by gestures and real concern, you can find whether they love you are not.
Suppose some one say ‘I love you and care for you’. She further reassures that ‘You must take care, say about driving’… but never reconfirms whether you reach safely!
Real caring shows by follow ups.
You know whether it is just courtesy or love. I don’t care how much an one supports me when I am partying but how much concerned one can get, if I am suffering.
Love shows, you can feel it, sense it.
PS : A point of caution.Many people are carefree by nature. They do feel love but not always show it. Depends on basic nature of person. If someone claims to be caring and doesn’t show up at right moment, you know love is hollow.