No one knows you better than you know yourself. HOW DO YOU KNOW IF SOME ONE IS JEALOUS OF YOU? they make fun of something that isn't wrong with you they copy your hair/clothes/or technique they try...
If you mean by he is "the one" it is when everything clicks and he is good natured, loyal, friendly, humorous, warm/inviting, and is just plain fun to be around. And when you kiss him you fall even...