the grass is always greener on the other side

"the grass is always greener on the other side": The others' circumstances seem more desirable.

the usual, ordinary

always, invariably, all the time / usually / (with a negative verb) never

grass, a lawn

blue / (of vegetation or traffic lights) green / pale / unripe; green (inexperienced)

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

a neighbour / neighbor / that which is neighbouring / something continuously connected front and back over a certain time period

to neighbour/neighbor, be adjacent to