The way I hear this song is a guy rambling on about his fantasies to his girlfriend or S/O, places he'd like to go to escape because he doesn't enjoy his real life too much anymore. He both simultaneously reminisces about better times and dreams up new ones about where he'd like to be and go to be happy again. The chorus is her telling him that he can be happy again, he once was and that she's willing to help take him back to that place.
The way I hear this song is a guy rambling on about his fantasies to his girlfriend or S/O, places he'd like to go to escape because he doesn't enjoy his real life too much anymore. He both simultaneously reminisces about better times and dreams up new ones about where he'd like to be and go to be happy again. The chorus is her telling him that he can be happy again, he once was and that she's willing to help take him back to that place.