Approaching offline shows you are showing confidence. Any idiot can steal photos and claim to be a chick and mess around online and waste other people's valuable times.
Most 9 or 10/10 guys on dating sites are fat ugly neck beards that steal male model pics and claim to be someone else like it was back in chat room days.
When a girl says just want to be friends or they have a boyfriend or insert some other stupid excuse = they are not interested in you. Move onto next!