Am I a bad person?

I'm fantising about one of my best female friends whilst my boyfriend is in europe- this is the first time iv thought about someone else specifically since he has been gone.
But omg..... i want her, and i'm seeing her tonight
I know we will probabaly make out and bump and grind, thats what we do- people expect it of us
Andy doesn't mind it

but i really want her

i keep fantisisng about the things i want to do to her

i am a bad bad person