This statement carries a message of self-worth and empowerment in relationships. It suggests that if someone in a relationship behaves as though they can easily live without you and doesn't value your presence, it might be best to allow them to do so.
The phrase "If they act like they can live without you, let them" implies that it's important to be in a relationship where both individuals value and appreciate each other. It underscores the idea that you deserve to be with someone who recognizes your worth and actively wants to be a part of your life.
In essence, this quote encourages individuals to prioritize their own well-being and not settle for a relationship where they feel unimportant or undervalued. It emphasizes the importance of mutual respect and appreciation in any healthy and fulfilling partnership.