They can be great and amazing if you find the right guy/girl. Of course though some relationhipss that arent meant to be will end quickly and will come with a lot of crying and emotion. We usualy go through a lot of "relationships" that shouldnt be classified at relationships. Go listen to a Taylor Swift album (:
I think relationship is something which has mutual understanding between two people. Like your parents, your friends and similarly like you bf or gf. never expect anything cause when expectations are broken it hurts a lot.