how do you know if your in love?

I think that you never really know when you are truely in love with someone, because you never know if there is someone you could love more!
But when you are in love, for me, you think about the person all the time, and want to be with them always!! Thats just my opinion though!!

You need to learn the difference between infatuation and love. When you're in a relationship and it's going great, you're spending all your time together, thinking about each other constantly, and all of that, it's infatuation (most likely). This is in the beginning of a relationship and can last for years. When this stage passes and you still want to spend time with that person, it's more than infatuation, but not neccesarily love. Each person has his/her own ideas and definitions on love. You must find that answer for yourself.