A couple years ago I moved away from the city in which I went to university. During my time in this city I made a friend, let's call him Bob. I felt my friendship was very close with Bob. We had gone on several trips together and knew each other's family. After I finished school, I moved to another city. I tried keeping in touch with Bob through text messaging, but he didn't really seem into it. After a while he stopped replying altogether. I sent him a text wishing him a happy new year, and got a reply that he doesn't know who I am and I got the wrong number. I replied "is this Bob?" and he replied "no". I then went to a mutual friend to get Bob's number, and from this response I got the same number I had been using all along.
I'm not sure what to do next. Bob is a carpenter and doesn't have social media like Facebook or email, and in general doesn't like technology. I don't want to put mutual friends into the middle of this. If Bob really doesn't want to be friends with me, I'll accept it, but I'd like to know for certain. For example, it is possible that my mutual friend isn't aware of Bob's new number.
My other friend I made while going to school, we talk on the phone frequently and reply to each other's Facebook posts. Bob just has a different personality, he's very non-technical and finds it difficult to type on a keyboard. If he's just not into exchanging text messages, I get that, but I would like to know that if we're ever in the same city we'd visit.
BTW, one of the reasons I think Bob may be pretending not to know me, is because if a person doesn't recognize a number they usually say "who is this?" not "I don't know you, you've got the wrong number" (especially to a thing like "happy new years"). I guess I could phone him and see if I get his voicemail, but that doesn't seem like the right thing to do.
How can I find out whether or not Bob still wants to be friends with me, and get back in touch with him without putting mutual friends in the middle?