Of Different Dimensions

Alyssa is a dimension traveler. She can go through every different dimension the human mind have thought about. Another perk, she's also an immortal. It doesn't really seem perfect as it seems. You can't fall in love with anyone. You remain single forever. Other than falling in love with another dimension traveler, in which Alyssa thinks won't happen. When Alyssa ventures to the human world, she falls for a boy she meets. Will she stop loving him or will she be with him and become a mortal?