How to break a guys heart?

okay so this might sound bitchy but this guy needs to know that he just cant take virginity's and hurt girls. he did this to my best friend, she really liked him and was the perfect gf. he was just an asshole. im planning to make him think there is an amazing connection between us and then ill break him. my friend wants me to do this and ive done it before. it always works but this guy is really tough so what i usually do probably wont work on him. any idea would be appreciated! plus he tells all girls the same crap just so they'll sleep with him. he's trying to do that with me, but im one step ahead of him. thanks!