Your Girlfriend (In Isolation)

I'm a boy and she's a girl
With more charm than most movie stars
So we met through a friend
We rent a place and she comes 'round to stay
And now your girlfriend is ringing in my ears again
It's no sure shot, but she likes all my favourite things
I know I shouldn't, but I'd like to spend more time with her
I wish she'd come over today
What am I supposed to do?
I can tell they get along so well
Is it possible she likes me too?
I'm not sure if I should read between those lines
And now your girlfriend is ringing in my ears again
I should be moving out, but can't 'cause we've just signed a lease
My hands are shaking, the bedroom walls are paper-thin
I heard her come over today
Thought maybe we'd go out for a movie
And we can forget friends who'll be fuming
Then I could walk you home in the evening
And that's just being friendly
And now your girlfriend is ringing in my ears again
And when she smiles, I can't hide my jealousy
Oh, I can't take it, boy, I hope she's faking it
I heard he bought a ring today
I heard they got engaged today