Most Helpful Guy
Because why chase when you can get a girl way? It's so easy to meet girls nowadays, that there's no point on wasting your time chasing a girl you don't know for sure that she likes you, and when you don't give him attention, what he thinks is "well, she may not be interested". Therefore you move on to the next girl, cause there's always another girl, and there's always a girl that will give it to you easier, so why chase? There's no point in chasing.
Most Helpful Girl
He's not interested. Or he just can't be bothered with games.