Sure. There are fanfics that explore their emotional bond without any sexual undertones. These can be really heartwarming, like stories where they save each other from danger and then have a deep conversation about their dreams and fears, strengthening their connection as comrades and friends.
Yes, there are many. You can find a lot of fan - fictions that focus on their friendship, adventures together, or the development of their relationship in a platonic way. For example, some might center around their quests in the Fairy Tail guild, how they support each other during battles and grow as wizards.