EXPOSURE THERAPY...hmmm i know someone who was afraid of girls...the ones he liked anyways

and he had to say hello or good morning to start with this one girl he thought was pretty and he kinda knew her alittle too just never really spoke to her unless she initiated, then he hda to do it everyday instead of hiding from her or saying nothing to her at all.
HE then graduated to asking a question ''how ya doing?" or saying something else to her when he walked by her, anything..small talk to the girl..unfortunately he took 3 steps forward and then 2 steps back, he couldn't get passed the ''good morning'' or ''how ya doing?'; and just kept being around her but not talking to her and then eventually avoided all together..he gave up!!!!The anxiety was too much for him i guess.
Then he tried it with another girl as well..not attracted to her but a girl none the less but she was not very receptive and i don't think he cared about her at all..he should have stuck with the first one i told him HE LIKED HER AND SHE REALLY SEEMED TO LIKE HIM!!!!!!!!!!!!
Thats what i know about Exposure Therapy.