hey everyone... so right now im in a loving relationship with this girl whom i met through a good buddy of mine. her and i started dating after she broke up with the friend. because i know the guy and had heard things about their sex life while i was just their mutual acquaintance (before any feelings between her and i developed), im now miserable when i start to think about her and him being intimate such a short time ago... and this leads to thinking about her with other previous boyfriends, etc and it all just gets blown out of proportion in my head. what are some things you tell yourself to keep from worrying about such petty former situations? thanks much.