Love is a genuine care and concern for someone that goes beyond the "thoughts and prayers" that most people give out (not that it's bad, just saying there's more to actual love). When you love someone, you are usually willing to make sacrifices for them when needed and you also have the faith that they'd do the same for you. You have a high level of trust and respect for one another. You truly care for one another and want to care for one another.
That's my view on family and friend kinds of love, anyways. Couldn't tell you what romantic love is like.