Guys, if a woman wants a relationship, how should she communicate that?

So many women will start seeing a guy, weeks or months go by, and they start to feel like they want a relationship. Women usually want this to feel more secure because being in a gray zone with a man is just flat out uncomfortable sometimes if she really is into a guy. So many women have no idea how to communicate that they want a relationship with a man. It can feel like we are overthinking things or asking for too much. What's the best way for a woman to approach this conversation with a man? Or do you feel like if a guy wants to be with a girl enough, he would approach this conversation first?
Guys, if a woman wants a relationship, how should she communicate that?
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