Describing Logan and Scott as best friends...is not really accurate, not even at that time, mutual respect is basically the closest that they ever got (although is worth mentioning that their rilvary was actually pretty short lived), if someone is hisnbest friend on the group is either Ororo or Kurt. He rejected because of his state mind as you said and his personal history with death lovers, around that time in his solo it was commented that Logan pretty much stopped looking for long term romance since the deatb of Mariko and it was partially why he stopped pursuing her after X-Ticion Agenda.