he's a good guy and opens his home to odysseus knowing that hes a total stranger. We also learn that odysseus was eummeaus' master which he fears is lost for good. I believe Odysseus told his tale because he doesnt want to let just one person know he's back he wants his whole land to know at once. Eummeaus treats odysseus extremely well because he is telling him stories about odysseus and he gives him hope that he is still out there