Everyday a person either hates or loves another. Whether it be a friendship love, a family love, or a relationship love, each feeling is different. For instance, you start dating someone new. You are spending time with the person and are doing everything with that person. Now if you can't catergorize that as love, well then what is the point in having the relationship.
Some people think it's the warm feeling down deep inside their bodies.
That is just a physical reaction to the other person. Some think it has something to do with the other person making a sacrifice to do something above and beyond the call of duty. For instance, showing up on your doorstep unannounced with a dozen roses. If all these things have a reason behind them, then how can anyone seriously catergorize love into something it's not. That doesn't make sense, but once it happens to you, once you are floored by that one you've been looking for, once you feel the warm feeling, or when that special someone shows up with the dozen roses, you WILL understand the concept of love.