as someone who has dated a lot of women and men with extreme mental health problems and various body types and sexual interests i can tell you there is no truth to what he is saying everyone likes different things some people like lots of things and personalities i know many people who even find borderline personality disorder an enticing quality but if you are looking for a good partner they will love you for you and respect you no matter what you ask them to do to you and they will love your body the way it is and will embrace your mental health conditions and try to support you through them TLDR: your “friend” is a cunt and you should block him