How do I knock some sense into him?

I pined after a girl for about 3 years. It was pathetic in hindsight. I spent ages making myself the person I thought she would want to go out with... in my mind that person was not a guy who is fixated on one person, it was a sociable person who keeps fit, is funny and knowledgeable and has all sorts of good qualities to offer. Over time.. it became more about making myself better in general than making myself acceptable for her.Now.. I am so completely changed that I don't even like her anymore beyond a friend. If she asked me out now I would decline. It is ok to try harder to win over a girl you like when you see someone who you feel you make a good fit with... but it is pathetic to try and put yourself somewhere you don't fit...If he can break up their 5 year strong relationship... what will stop that happening to him. They are strong because they fit together... you can't jam two pieces that don't fit together and be proud of it. Tell him to start looking for other pieces.

sometimes the only way to knock some sence into some one is to let thrm learn for them self......school of hard knocks.

A friend once explained that his way of getting over crushes was not to stay away, but to allow himself to be in his crush's presence, until the magic faded, and he saw her as a normal person once more. I don't know what the best way of getting over an attraction is, but chances are you can't spare him the heart-ache... It's possible that, with his stubborn mindset, he doesn't even WANT to be spared the heart-ache. If he's strong enough however, he will accept rejection. Sometimes suffering is the only way to grow, and become a wiser person.