They may have already seen and experienced much of the mountain that people on your path haven't yet. Your journey can be greatly enhanced by what they have to offer. You might even want to walk a ways with them, but have good reasons before you leave your best-known path permanently. Other pastures and their paths may only look greener, and you may walk much more slowly on them. The Buddha achieved enlightenment sitting alone under the bodi tree.
All spiritual disciplines stress some kind of meditation or prayer.
Spiritual depth is often achieved only through suffering, and sharing amongst travelling companions can become most profound at these times. While these moments are obviously not sought out, they should be understood and appreciated for the new vistas they open when they occur. Travelling a spiritual path should include singing and dancing, eating and drinking together, celebrating life in all of its marvels. A sense of humor can produce more insight and fulfillment than virtually anything else one can carry in one's backpack along the way. In my own spiritual journey, I've come more and more to appreciate the Christianity of my childhood.