Is he a stalker or obsessed with me?

I recently went to a friends house for dinner and took my kitten. Later in the evening when I was getting ready to leave I started looking for my cat and found a pair of my missing shoes under my friends bed. There have been a few strange things with this person but I thought it was because of his beng an older man, maybie memory problems. I had to go out of town and he said that he would feed the cat for me but when I got home someone had been in my bedroom, there were some things out of place. He was the only one with a key. I had dropped him off friday to attend something over the weekend and when I picked him up on sunday he told me to be there at 4:00 but I waited untill 5:30 untill we got to leave. He then started asking me questions about my weekend, did I get my shopping done, how did my truck drive, etc. I did not have my truck but one evening this weekend. Is he fishinfg to see what I did or is someone telling him what I did, this was an issue in the past but I dont know why, I thought it was straightened out.I am starting to get a little nervous. One of my friends told me he told them that he wanted to tame me a few monthes ago. I have made it clear to everyone I am not interested in dating right now, I am too busy with school and chores around the house. He also keeps wanting to come over to cut my grass but I can do that myself. Is he someone that is looking for something to keep him busy or is he stalking me?