To be stonewalling you need to be physically together. Think of a couple living together, with one who tries to engage while the other is unresponsiveonsive - literally as if the person isn't there. It is a constant and amounts to emotional torture for the partner on the receiving end.

What you're going through is someone "ghosting" you by disappearing. Still not a great thing to do but it's not stonewalling or abusive. It's essentially a passive way of breaking up with someone, so if I were you id walk away. If she hasn't contacted you in 7 weeks she's most likely not going to at all. If she does, I would try to have more self respect and let her know you've moved on. People will treat you the way you allow them to, unfortunately.