This Must Be Love

I'm smiling at my phone
I'm singing in the car
I take the longer road
Just to pass where you are
I never used to act this way
But look at what you did today
My heart beats faster when you call
I miss you before you even go
If this is what
I've heard about
This must be love
I wake up early to see you first
I steal your
T-shirt
And wear it to work