U shd just tell your boss abt this as it "affecting you at work"
here's an idea. go to amoy street, find one of the big gang leaders and get him and his men to give him a pep talk
let this be a heads up for you guys.
when a gal rejects you, seriously, dont waste your time anymore.
there's a difference between perserverance and persistence.
keep your distance.
else, you will even lose the friendship...
Any colleague who's close to him? Surely you know mah. ^_^