Spearman is partners with the Sorceress and the two are often seen together. It is implied that she is, in fact, in love with Spearman as both of them refer to their adventures as "dates".
Spearman possesses some dislike for Goblin Slayer, due to the latter's appearance and personality. He always grumbles about how he can get Guild Girl's attention when he himself can't. Despite this, he doesn't genuinely hate the fellow adventurer and was even one of the first people willing to help him protect Cow Girl's farm.
It seems apparent that Spearman has shown some sign of infatuation with Guild Girl.