DEAR AMY: I have been going to the same car mechanic since I moved to a new city, four years ago. I know he’s a dad because he has a son, but he has never worn a wedding ring. The last time I brought my car in, he offered to take it for a spin with me in the car, but I declined. I’ve had a crush on this man since I first met him. Should I say so, or is this something I can’t pursue? – Wanting in Oregon DEAR WANTING: I had a crush on the hunky guy who came to renovate my house – and I finally summoned the courage to tell him. We’ve been married, very happily, for 16 years. The risk here is that…