the situation between you lauren and damien

so i met damien when rob emailed me a date and time to meet up. it was at robs house that i met damien. i also met lauren in the same house. i was rehearsing with damien and rob and lauren appeared one night in my periphery. i was surprised, i didn't know the girl. but she was listening to my playing, and i was flattered. i later learned the girls name was lauren. to this day i still don't know her last name. i began to crush on the girl, i thought she was attractive and i like what she had to say. i had heard that damien was crushing on her. long story short, i kiss her, sleep with her, once each, but i don't manage to keep her around for a long term relationship, damien manages that, and he becomes fiercely protective of her, to the point where he became hostile towards me, and i became very bitter because of his foolishness.