His freind is trying to ruin our relationship why

So we were talking for a few weeks I never went and met him and never slept with him or nothing so I started talking to his freind and we connected and we fell in love with each other so the guy I used to talk to told him we have a thing going on and that I like him when that’s far from true and his freind believes him why is he being like that he gave his freind my number then his freind gave my number to the guy I’m talking to now so what is his problem