Why does this make me wanna cry?

Maybe it is the dark side of happiness, you know, when you are troubled with your own happy heart. When I was younger I used to think that it is just natural to be a little bit melancholic in weddings , because marriage is a life changing step, but no , this is not the reason why those things push me to the verge each time. It is something vague, yet so clear!!! Maybe it is the vanity of all human feelings ,,, Maybe it hurts to realize how simple , temporal and fading we are. Nice Palestinian wedding songs ,,,, Listen