cannot select gears. any advice is greatly appriciated Options

[KrowzerST165]

the car is a 1996 celica with 1.8L and manual tranny. here is what happened. i was drive home about around i was going about 25 and went to shift into 3rd when i heard a light buzz. i did not have the pedal depressed 100% so i let off as soon as i hear the buzz. no i was stuck in 2nd gear and the shifter moves forward and back but not side to side. i took it easy and got home (about 3 miles) and pulled off the center console to see one of the shifter cables is always moving and the other is not. i opened the hood and manually unselected the gear at the transmission. i can use the shift and go into 2,4. it would not select any other gears. i also had to get out and manually unselect the gear to get it to return to neutral. i had my girlfriend in the car and i manually went through all the gears (at transmission) no issues. so i stopped for the night since my flashlight sucks lol. im thinking it could be the selector but if anyone has any ideas i would appreciate any input.