@imsak,
1.Why wait any longer when so far he hasn't appeared?
2.We have lots of time, why hurry?
(Yea technically not spousta use comma but instead semi--or separate)
3.When (or "If") he doesn't love you at all, why waste so much time thinking about him?
4.Why ("are you" or just "you") still sitting there, don't you know it's getting late?
(Technically tho Isak tween it needs semi or period as in 2)
4.Why still sitting there? when it's so late
(Yes many will reject this one, Im, but others say it's okay)
4.Why (are you) still sitting there? Don't you know it's getting late?
4.Why still sitting there, it's getting late
(Current practice often in such cases to eliminate the "?"
5.Why ask such a question, it sounds absurd?
(See 4 above )
6.Why be with such an annoying person when you don't like her?
Doubtless Con or one of the other excellent techs will elaborate