How do you know?

How do you know whats true is true?
When the truth i believed in revolved around you.
How do you know when things are real?
When ill never know just how they feel.
How do you know whats love is love?
When lies and secrets are all I'm thinking of.
How do you know when things are right?
When all i think of is how he held me tight.
How do you know whats heartbreak is heartbreak?
When all I'm left with is a simple headache.
How do you know when things are at ease?
When i feel like i always have to please.
How do you know whats smart is smart?
When i thought everything was right from the start.
How do you know when things fun?
When the only fun i believe in is with that one.
How do you know whats you is you?
When all i can think of is what Ive turned into.