Why wait is used in the following text instead of have waited?
Ben: Aw, I can’t believe it. I wait all school year to go on this trip, and now the queen of cooties is along for the ride.
Gwen: Hey, I had my own vacation already all planned out, too, you know. (pulls out her schedule) Each activity is color-coded so I never do the same thing two days in a row. Now, I’m stuck with my geekazoid cousin going camping for three months.
Excerpt from And Then There Were Alternate 10 (a Ben 10 fan fiction)