let me ask you first... all this time you had UNPROTECTED SEX? like i see...you are knowing that you can get pregnant with SEX, also with protected, but even more possible with unprotected and countundiesd doing it?
im not trying to be rude but... i just dont understand that.
as for the guy... i know how you feel, one of my girlfriends is in the same situation, his friend with who she is having sex with has a girl, tells her that he has problems with her, so that they have sex... and she i soo in love with him that she cant stop. she knows its not right and that she deservs better, but she still is doing it... hope youll get the strenght to stop it!
my best of luck!