The process of letting go is so especially painful process but you need to let go, Otherwise we just keep ourselves stuck in the same place. It's not healthy to fantasize about a future with this person.
Quotes: "Stop waiting for Friday, for summer, for someone to fall in love with you, for life. Happiness is achieved when you stop waiting for it and make the most of the moment you are in now." Be mindful, and live in the moment.