That was the same with me, I would go a year without getting my haircut and believe me it never grew much.
In Sept. or Oct. of last year I started getting my haircut again. My hair was long about to my lower back and now it's a little longer than shoulder length. Since I've been keeping it short, I was going in about every 6 weeks to get it cut. I guess I made up for all those years of not getting it cut.
Now I've waited 3 months because I'm letting it grow out since it will.
Anyway, hang in there.