The more your friend ignore him, the more fun he's got.. the
sense of satisfaction is there "wah, this ger got attitude sia,
shiok.. sure must get her" smth lidat. 
You can do nth but to just ask ur fren to keep ignoring, dun ever
reply smth like "i'm nt interested in u leh, pls stop sms meee!"
dun ever do tht.. tht only shows u're still bother abt his
messages.. etc.. Just go sch as usual.. he wants to stare.. go
ahead.. the keyword is ignore ignore ignore.
After awhile when he's got new girls coming by, he'll switch
target.. .trust mee 