How can you tell if he's 'The One'?

Part of me says you just know, but that also goes with once you are with them for a while and u truely know that person. You must both be able to tell each other absolutely everything and be able to be yourself with this person. That includes not to be imbarressed to do anything in from of them or with them.

You will just know it somehow. if it starts and end soon then he/she was not the one u have waited for. but if it starts and ends with ur death then u met the right person:P

When you think of him and him alone and what makes him happy. When you build your dreams and future around him. And when you think of what would be best for your relationship.

I am able to tell my boyfriend is the one because of how I feel when I am with him. He is everything I could want in a man and more. It's hard to really describe how to tell if he's the one. It's just something in your heart, and it is generally different for each person.