How do you know?

How do you know when you're in love? How can you tell if its real?
Is your heart supposed to tell you?
Or is it just something that you feel?

How do you know how long it will last?
Or do you just take it day by day?
How do you know if it'll be forever?
What if it goes away?

How do you know if he feels that same?
How can you tell if he's true?
What happens if he breaks your heart?
Than what are you supposed to do?

I guess you're just supposed to be careful.
Beware of who you choose.
Because if you make the wrong decision,
In the end you'll always lose.