This proverb it is a useful reminder for everybody. Most people tend to be friendly and outgoing just to discover, after a while, how much the others care about them, when the answer is “nothing” then it is better to keep the distance.
If the people you stay with are the wrong type for you, remaining alone is a way better. This doesn’t mean you have to remain alone for the rest of your life, it means that it is better to choose the people you want to be surrounded with.
A good company is what can make you happy every day so it is only a matter of time and everyone will find the right one…in the meantime a little bit of time by yourself is not that bad!