Why conjure them, when they're all around you? You simply need to open yourself up to them, not drag one to wherever you are. Taking a walk in the woods in the same spot, cleaning it of tras often, and planting or watering flowers and plants there help you build trust. Eventually, they'll show themselves to you, and you'll have nice little companions.
Remember, they're not pets, toys, or anything like that. They're spiritual beings, and should be treated with respect.