No Jasper is a year ahead of Alice.
In new moon Rosalie and Emmett have graduated and Alice, Jasper and Edward are a year from graduation.
Alice and Edward are juniors in Twilight then seniors in New Moon. Emmet, Rosile, and Jasper in Twilight are seniors.
Jasper and Alice are not married - but they are together
No.
Edward and Alice are in their senior year. But Jasper, Rosalie, and Emmett graduated.
Alice and Jasper are very understanding of each other. They never fall out, but things may become slightly strained between them momentarily in New Moon when Jasper tries to attack Bella. However, Alice can understand why he did it.
Jasper graduated along with Emmett and Rosalie.
Yes, Jackson Rathbone and Ashley Greene both signed up for three movies so they will play in New Moon and Eclipse and maybe Breaking Dawn.
Yes, Jasper, Bella, and Alice all get along except for when Jasper is not able to control himself when he smells Bella at the time that she cut herself during her birthday party at the Cullen's house. The only time that Bella and Alice don't get along is when Bella is annoyed of Alice throwing her a birthday party or getting her ready for prom.
Edward, Jasper, Alice, Rosalie, Emmett & Esme
Carlisle, Esme, Emmett, Rosalie, Alice, Jasper and Edward...
Yes they are in New Moon. Another answer: After you have read all of the books from the Twilight series, Bella will have already graduated High School.