Thank you all for your replies. I am certain this is not a divorce issue so I can relax on that score. I think many of you are correct when you point out that aviation, like other pastimes, does not inspire most people. In fact almost everyone I have mentioned it to are bored within seconds. Thankfully I have a mate that also holds a PPL so we can bore each other.
I particularly like the quote;
"How do you know there's a pilot in the room?"
"He'll tell you!"
...........very true.
I will, however, have a go at confronting the issue with my other half over the weekend. I'll report back.