Relationship is like waiting for bus?

In a coffee shop, it was discussed that relationship seems like “waiting for bus”.

Often when we are waiting for a particular bus, other buses keeps coming and we give it a miss… If the bus we waited for comes on a regular timing, we will take it for granted and board it as it seems to be… But sometimes when we waited for a particular bus (especially when we are in a hurry), the waiting time always seems so long, and the worse part is that when it finally arrived, it is packed and everyone wants to board it too…

Like in a relationship, whenever we are in one, it seems like we have many other opportunities, and we can go into another relationship anytime… Therefore we often take our relationship for granted and not appreciating it… But whenever we are not in a relationship, it always seems so hard to wait for one to come by and get into it; and when the opportunity finally comes, it seems so hard, as competition is always so strong…