Codependency isn’t sexy. It isn’t romantic. It’s built with a fuse and will surely burn out. The healthiest thing you can say to the one you love is, “I would be okay without you, and that’s why I choose to stay.”
You can be in a relationship for two years and feel nothing; you can be in a relationship for 2 months and feel everything. Time is not a measure of quality; of infatuation, or of love.