C++ - Nested include - Avoiding 'include nested too deeply error'

Question

What is the best way of declaring my header files if I want to have the following connections in my C++ code, just so that I don't get the 'include nested too deeply error'?

On my edge class, I have some functions that need to return a Node object. Same for the Edge class, I have functions that need to return a Node object. However the compiler disallow me to have this nested loop thing.

Node.h

#ifndef _NODE_h__
#define __NODE_h__

#include "Edge.h" 
public:
    Node();
    ~Node();
    void setName(string);
    string getName();
    void addEdge(Edge*);
    vector<Edge* > getEdges() { return _edges; };
};
#endif

Edge.h

#ifndef _EDGE_h__
#define __EDGE_h__

#include "Node.h"
class Edge 
{
public:

    Edge();
    Edge(bool);
    ~Edge();
    bool hasBeenSeen() { return _seen; };
    void reset() { _seen = false; };  // resets seen param to false
    Node* getSource() { return _source; };
    Node* getTarget() { return _target; };
    void setSource(Node* source) { _source = source; };
    void setTarget(Node* target) { _target = target; };
};
#endif