I guess it is reasonable for many who have yet to experience love to be skeptical to its actual existence or validity.
In high school, I was friends with a girl who was virtually invisible to me for a few months until we were paired together for a class. We became good friends and over a course of two years, we became close and shared a lot of great experiences.
It wasn't until we were Juniors that I started seeing her in a different light. I kid you not, one day, when I saw her across the hall, I had one of those "slow-motion, walking away, music in the background, only focused on her" moments that is shown in a lot of movies. I didn't even recognize her until after the moment has passed.
I know it sounds cheesy, but after that, I would get a strange feeling when I was around her and I would feel nervous towards her when previously did not.
The "feeling" was amazing, to say the least. It was like a warm sensation that came from my heart, I could feel my blood rushing, but not like rushing rapids, but a quiet, warm stream. I never wanted that feeling to end and we became a little close towards the end of our high school years.
Although it didn't work out between us, the feeling I had was the closest thing to "love" that I have felt, so I believe that it takes the right person to demonstrate that "love" exists and that it is a feeling that brings two complete strangers closer together.
So that's my experience and to those who are still skeptical, all it takes is one person to have you believing in love.