My neighbour keeps pestering me about my marital status and I don't know how to feel?

I'm 37 and single. Right. OK. No big deal for me. However, my Asian neighbour (who lives about 4 houses away from me and who I frequently see at the same bus stop now and again on the way to work and is a married man with 3 children in their 20's) is very friendly and chatty. I feel his friendliness is fine, but only occasionally, seeing as it is very early in the morning and I just want to be quiet until I 'come to'. He has begun to ask why at my age I still live with my mum, and why at 37 I'm not married. I don't mind anyone being friendly, but I feel he has crossed the line. I told him that I'm not interested in discussing personal matters a while back, but he's started up again. I now avoid him at all costs and keep my head down at the bus stop when I see him, as I can't stand the man nor his familiarity. Am I normal to feel this way and is what I doing right?