@Grace1 - I have read through this thread and am aware that you have been asked a number of times if you are certain he does not have a wife, girlfriend or a live in lover etc.,
Really you haven't answered this.
The only information you have is what he has told you and really - it doesn't add up. Sure he has a mother and a sibling to care for but that does not exclude him from calling you out of office hours to catch up with you or sharing
some other time with you - yet he doesn't.
You have no evidence to suggest he
doesn't have a wife, girlfriend or a live in lover.
You have no evidence or experience with him to suggest he is actually remotely interested in you outside of walking to and from a train and some communication within strictly defined boundaries and he has actually told you what those boundaries are.
I am finding it really difficult to understand how attached you have become to a man that you actually barely know and from his actions, it isn't likely you will get to know.
Take a break from walking to and from the train with him or whatever and possibly sit down and have a long think about how you are thinking and feeling because that doesn't add up either.