S. R. Faruqi:

In the verse the pleasure of 'implication' is fine. By saying 'by this road' he has made it clear that he is neither at home nor in the beloved's street-- he's seated somewhere on the roadway.

Behind the verse, there's also a little story. Word had come that the beloved would pass by on some road; thus he went there and remained seated beside the road. But the beloved didn't come by that way at all. When there was no hope left of her coming, he consoled his heart: 'If she had come, then we would have become out of control; all right, her not coming had at least the advantage that our endurance/patience was not tested'.

FWP:

SETS == WORDPLAY
MOTIFS == ROAD
NAMES
TERMS == IMPLICATION

Ideally, patience and endurance are thought of as lasting until some desired event occurs; here they are thought of as lasting only as long as some ideal event does not occur. Ideally, when the desired event occurs then patience and endurance are no longer necessary and can be cheerfully discarded; here, when the desired event occurs then they would be all the more necessary and required. The poor lover manages to have the worst of all worlds.

And when that desired event is imagined, the speaker's reaction occurs in a flurry of wordplay. Idiomatically, of course, the phrase ham se nah rahaa jaataa means 'it cannot be endured by us'. But literally the phrase means '[it] is not remained by us'-- which works well with the idea that if she had come by this way, we would not have been able to endure it (to 'stay here').

Moreover, the rahaa jaataa not only contains forms of both 'remain' and 'go' but also correlates well with her 'coming' and/or 'emerging'. In addition, rahaa evokes 'road' [raah , rah] and also reminds us of rihaa , 'released', which is almost the opposite of the speaker's state of 'endurance, long-suffering'.