There is no reason to be jealous (for real - we'll never be better than "everybody" in any case - we never know what's really attract the other one it could be something that you don't like yourself) BUT there is only reason to end up a relationship (it works or not - you can handle it or not) ... Jealousy is not our friend it doesn't help to feel better, it doesn't even help for understanding it only turns you sour, and is always quiet obvious (like the nose in the middle of the face) That's when everybody knows you are not confidente with yourself (Ooops)
Those who likes you to be jealous are not your friends
And those who are suffering from your jealousy won't be able to stay your friend (cause it really sucks at the end - you make yourself your own enemy)