Just to let everyone know, I have solved the issue finally!
The switch that cancels the cruise failed. I removed the plug and tested the switch for continuity...There was none. So I jumped the plug with a piece of wire. Took her for a drive down an empty road and voila, cruise! I feel so dumb for not checking it before...But whatever.
Also, when I went to cancel it I hit the brakes out of habit, and it cancelled! According to the wiring diagram, the brake light switch sends a signal to the cruise computer as a failsafe shut off. I'm gonna get a new switch but at least it works for now. But the vacuum hose must have a leak because the speed slooowly creeps down.