I wonder how many people don't get the one they want, but end up with the one they're supposed to be with.

This quote means that not everyone gets the person they romantically desire or hope to be with. But sometimes even if they don’t get the person they wanted, they might end up with someone who is meant for them and has a deeper connection with them. This person could be a better match for them and in the end, it may be better for them to be together.