I'm sorry but I'd have to disagree. They don't speak up because society doesn't allow them to because of the weird belief that women are meant to be below the men hence their feelings are often considered invalid.
There's no such thing as responsibility when it comes to matters of the heart. If you like someone and you choose to not express yourself but hope he will express himself instead then something is wrong somewhere aftrall you're the one with the feelings.
Expressing yourself simply means you identify your feelings and you're willing to act it out. Now, if whoever you're expressing yourself to isn't interested in you, it's quite simple. It's nothing to be worried about.
But the mentality of considering it a man's responsibility to do the wooing is wrong because.. each individual has his or her own free will and can express themselves as they see fit. Hence as a man, I can express myself to my love interest, similarly a woman is allowed to express herself to her love interest too. It has nothing to do with responsibility.- That's simply the weird African culture I was addressing in the video.