A good friend of mine asked me, "How do you know if it's true love?"
Considering the fact that she was trying to decide if she should marry someone, I took her question seriously.
My first answer to that question is usually - "Do you like the person?" If you don't, then it can't be love.
The second answer is a little more involved - "Does he make you feel special, happy, and safe?" If you don't feel special, happy, and safe, then he's not the one for you.