I personally think you should do you best to see if he has a home,contact shelters, and maybe you could post in newspapers, call to idenify...... take him to the vet see if he might have a id mictrochip, personally even though he has been around your house for awhile he might be lost, he could have had a family on vacation and they brought him with them and he wandered off... that what happened to one of our dogs, and we couldn't find him untill a couple mouths later, just try your best to see if her has a home and if he dosn't have a home then keep him or find a home.... I think he might have a home, because he is sweet and loves other people and dogs, not alot of stray dog's are like that