‘Troglodytes!’ he called, his voice echoing deep into the cave. ‘It is Nico di Angelo, son of Hades! I have returned with my glow-in-the-dark boyfriend, Will Solace!’
Even though Scully didn't tell Mulder she loved him at the end of Triangle, she kind of spent the whole episode leading up to that moment showing him she loved him through her actions. She ran through the Hoover building like a crazy woman wheeling and dealing with anyone who would listen to get the information that would help save his life. Even 1939 Scully trusted him enough to somehow turn the ship around therefore ensuring they would meet again.
nothing will ever come close to the pure heartbreak that hits when a canon compliant fic gets to the part in which wolfstar starts suspecting each other of being the spy.