Rogue

Initially a ward of Magneto, Rogue developed feelings for Remy while he was part of Magneto's X-Men and the other man's friend. These feeling were reciprocated, however they could not act on them physically due to Rogue's powers. Seeing how much it was hurting his friends, Magneto promised the pair that he would find a way to negate Rogue's powers and allow them to touch, however during the testing process Magneto realised that he too had feelings for her. Realising that the only way to negate her powers was for him to create an electromagnetic field, Magneto did so and kissed Rogue, unaware that Remy was watching.

Confronting his friend and the woman he loved, Remy's angry tirade was interupted by one of Apocalypse's servants, and in the ensuing battle both he and Magneto were placed in danger, prompting Rogue to make a choice between them. She chose Magneto. Betrayed, Remy left the X-Men and set up the X-Ternals, eventually falling for Lila Cheney, although he still loved Rogue.

Knowing that Rogue would never be with him, especially after her son was born, Remy eventually sacrificed his love for her to the M'Krann Crystal in order to get the shard of it needed to save the world and restore the timeline. Free of this love, he continued his relationship with Lila, even choosing to save her over the crystal shard when presented with the choice.