How do you know when he/she is the ONE?

That may vary from person to person. But in my experience, I knew her to be the one for me because I felt distinctly close to her (even during those times we barely knew each other well), very different from the unsettled mind experienced in infatuations and falling in love. It felt like there is something special I had for her in my heart.

That is a really hard question to answer. From my experience, I just knew that he was the one for me. I've had other boyfriends before him and I surely didn't think that they were the one, I thought I might have "loved" them, but I didn't picture us growing old together. Do you picture growing old with him?

I just found mine, hehehheh i came to a conclusion that he is the one, because, he is the only person that makes me feel easy to be with, can laugh the differences, someone that has a capable to love me, and just accept me of who I am.. that's what he is now...

I'll know when she's the one when i'm comfortable with her. I really don't have any attitude criteria besides those horrible attitudes i hate like shouting in the public, burping loudly, etc. I base it on the level of how comfortable i am with her.

Well, when whatever happens he/she is always there to help you, to understand you, to take care of you. The relationships have to be a bidirectional relation, when you are the only one who worries about it, then it's something wrong.

when your doing all the things that lovers do.