II feel like I have been manipulated even by my son's girlfriend to be honest ..the first one dumped him when he started using drugs the second one met him when he was clean a month or so but soon started using she would act like she was worried and begging him to get help ...then after about a years she ended up in rehab apparently she was using the whole time and I was just blind to to ...I understand what you are feeling but do we really ever know..