Your shifter won't move back into 4H or 2H?
[edit, forgot you are Manual Trans]
So you just have two shift positions, LO and HI. But the question still stands, the shift lever won't move?
After getting high centered I've put some Bud Builts on my build parts list. I really think I wouldn't have gotten stuck if I'd had them. And a 3" lift, more aggressive tires and a winch.