As we mentioned in our trivia facts above, Erwin Smith chose to be a single man in the end. His life as a soldier meant that he did not have the luxury of setting down. While he could marry and have a family, he was subjecting them to his lifestyle. At any moment, he could die in battle and they would be left with nothing. With that said, he did have a love interest canonically. It was revealed in the backstory for Erwin that he fell in love with a woman named Marie Dok. Erwin first encountered her at a bar many years ago while he was still training to be a soldier. Over time, his feelings grew for her but Erwin’s friend, Nile Dok, fell for her as well. In the end, Erwin gave up his chance of being with her. When it came time to join the Survey Corps, he made the hard decision to pursue his passion for the truth and nothing else. This meant leaving behind his chance of being with the woman he loved. Because of that, his friend, Nile, married Marie after joining the Military Police division. With a cushier job and less danger involved, Erwin seemingly felt satisfied knowing that she was with him. Unfortunately, the untimely death of Nile Dok would leave Marie to be a widow raising their three children. It also means that she would have tragically become a widow no matter who she married between the two. Erwin’s love interest is last seen in the series living in Wall Rose and raising her family. As such, it does appear that she was possibly able to escape the horrifying deaths of many other citizens on the island.