It’s obvious that liking something on Facebook is a conscious act. And the post would not get liked, publicly at least, without that act.
However I think it’s less obvious that liking your life is a conscious act. Especially liking as many moments of it as possible. And it seems quite possible that you won’t like your life as much without those conscious acts of liking.
Of course more goes into enjoying your life than just consciously liking it. Things like sleep, exercise, diet, friendships, family, work, and community. The list could go on and on. But the act of consciously liking your life seems just as important as any of those other things. Maybe more so.