What do you think is he into me or what?

My friends wife passed away two years ago. I help him with their 3 kids, carpool, mall, games, school pick-up, styling hair that kind of stuff. His female friend got jealous when I called and talked to him about something that was going on with one of his kids. She accused us of sleeping together and said it should have come from someone else- So, he broke it off with her. Besides, she wanted them to move in together. He said, he wasn't ready for that kind of relationship. I saw him a few days ago, one of the kids left something in my car. I called and asked him if I could drop the item off at their house. He said sure. When I was leaving he said, I don't know when I am going to see you again.I replied, your kids will call me for something. Do you all think he is into me?