how to get nearest entity to an entity

try this, I haven't tested it,

what does yours look like? can you send a screenshot

hm, this worked,

world.getEntitiesOfClass(LivingEntity.class,
						AABB.ofSize(new Vec3(x, y, z), 5, 5, 5)).stream()
				.filter(e -> !(e instanceof Player))
				.min(Comparator.comparingDouble(e -> e.distanceToSqr(x, y, z)))
				.orElse(null);

with this you can make a tag for the ones to skip,

world.getEntitiesOfClass(LivingEntity.class, AABB.ofSize(new Vec3(x, y, z), 5, 5, 5)).stream()
				.filter(e -> e.getType().is(TagKey.create(Registries.ENTITY_TYPE, ResourceLocation.parse("minecraft:skeletons"))))
				.min(Comparator.comparingDouble(e -> e.distanceToSqr(x, y, z)))
				.orElse(null)

replace "minecraft:skeletons"  with your tag

oh yeah and the 5, 5, 5 in the first line is the size it should look in

oh you can't add players to entity tags?

what entities do you need to not be affected?

oh then you should probably use the tag method, 

try this,