How?

There are many reasons, you can even search it on the internet.. Some of the signs are you're always thinking about him or her, you are very happy when you're together and you fell "warm inside"....something like that. If you feel love towards someone i think you should confess it to avoid regrets later..

We are nit always sure that we love someone. We may think it is only a dream we have to love that person. Love is a powerful and captivating emotion to have. We feel love in our hearts but that is only the beginning. When that person is first in your mind and takes over your thoughts, then you know you are in love with them.

Well you will find your heart smiling and happy than before. You feel everything beautiful around you. Well you can enjoy the feelings and then share it with the loved one.

How will you know if you're in love with someone? When there's a smile in your face everytime you think of him, or when you're having hard time going to sleep because of him, or you're always excited to see him. There's a lot of signs for you to know if your falling for someone. And for me because I'm a girl I don't think I can tell him that Im falling for him.

you will know that you love someone when you can't explain your feeling for him/her. Yes, im willing to confess my feelings as long as no other parties are involved. I mean she/he is single. But if she/he is not single anymore I will just keep this feeling on myself and maybe divert this and move on.