I feel like a good listener is a very attractive quality in both friends and romantic partners. Good listeners make you feel important, like what you are saying matters. They make you feel heard and just being with someone who appreciates that sometimes it is needed for other people to talk, rather than just talking about themselves, makes you love them more.
Of course, like everything else, this should be a two-way street. If someone is considerate enough to listen to you and to notice your concerns, then you should return the favor. Likewise, if one of your close friends/relatives are not good listeners, you can practice that skill and hopefully make them realize how polite and considerate you’re being.
Be a good listener. And always listen to understand, not to reply.