Oh tee_pirategirl you missed what the writers said was going on with Jack and Liz
They both want each other but dont want to want..thats a far more interesting and steamy romance compared to boring.."Oh I love you!".."Oh I love you too!"...thats so totally Buffy and Angel..and we all know why that relationship only lasted 3 seasons because thats about as much as they could milk from it... whilst Spike and Buffy lasted a lot longer than that...because its by far more interesting to watch and work with..Buffy wanted spike but didnt want to want her..Spike wanted buffy but didnt want to want her..and this relationship became the most popular by far on Buffy 🙂