Summer Forest and Dylan Shay are fairly harmonious, but often have trouble as Dylan often is injured, and Summer will become extremely worried. At one point, Dylan left to train for a long period of time, and it drove Summer to insanity not knowing if he was okay. He returned, and they returned to their normal status. Their relationship has never truly been in jeopardy of failing.
However, eventually, Dylan was killed, causing Summer to fall into a state of depression. Later, she went on a quest, where she was killed. At the end of the quest, Kayla was allowed to choose one person to bring back to life out of Connor, Summer and Dylan. She chose Connor since "Summer is probably happier with Dylan when they are both dead".