Do you use a whip? Or a lunge line? Try pointing the whip at her haunches and say "out" at the same time. My mare didn't know how to lunge when I first got her, and I did that and a week later she would go out without me having to even hold a whip in my hand.
I lunge with a whip. I did try that though. I would point and tap at her hip to move out but she just doesn't understand. I have made noises, made wierd movements, and whatever I could do to make her move out. I have almost given up on lunging for her.
Longeing is an art form and far more involved than mere circles. Like riding it requires that a certain set of basics be in place before moving onto the next level.
Clearly your horse has no concept of longeing or the aids, so you have to start from the beginning.
The 'old school' way of teaching longeing involved two people, the person with the longeline and whip and the 'helper' on the opposite side with a lead to reinforce the introduction of the aids. It doesn't have to be done that way, and one knowledgeable person can do it on their own, but that is the original way and makes things easier.
It would take me an hour of typing to tell you how to introduce your horse to longeing, but still w/o someone there to correct 'you', it would really be a futile attempt. So my best suggestion is that you employ a knowledgeable person to get both you and your horse started firsthand.
The horse should be in a longeing cavesson, longeline and whip are held a certain way, the aids are very specific (for instance the actually whip aid to push the horse out onto the circle is to point the whip at the girth...to push just the shoulder out it's pointed at the shoulder, to push the haunches out it's point behind the girth), etc...
She never invades my space I have taught her to lead properly with all the basic cues. I guess maybe it is because she hates leaving my side. She doesn't understand why I would want to push her away.
I have had an experienced trainer their to help me but we still can't make her unless we physically beat her which I would never do. My trainer suggests just not lunging and just ground drive her( which she gets because of the outside pressure).
Do you think that it would be fine to just skip lunging? Ill will probably never sell her so Im not out to impress I buyer with what she can do.
I would never suggest skipping lunging because of the fact it is fairly important but I have tried EVERYTHING!