Kindness Being Abuse

I consider him as my best friend. He was also a nice guy before when we meet. He is my staff, so anything I commanded him during working hours he followed. At the beginning I am hesitant to accompanied him, specially when he will go outside for grocery or shopping. We become close because we walk, in short- at the same path.

Lately, I discover some of his bad attitude. He abuse my kindness. When I visited his place, I saw his situations very hard. No more bucks to pay bills and also for their daily needs.

One day, their electricity and water almost cut off because they didn't pay for almost 2months. I give him the money and he pay the bills. But I didn't know that the amount I give has a change of about $15. He did it many time already, I allow him to used my clothes because he is my best friend. Everything I have he can used except my wife.

But last time I visited him, I was amazed on the attitude he showed to me. He doesn't care to me, even attending my breakfast. He borrowed me money around $2,500 until now even $5 he doesn't pay.

I don't want to destroy our friendship, despite of his attitude sometimes, still his good attitude registered on my mind. I won't count the bad things did of a friend. Instead, I always count the good things that he did for me.

What should I do that our friendship still remain?