Time to DTR

I was in my usual spot behind the front desk at the college dormitory where I work, talking to several students. One was in a new romantic relationship. Things were going well, he said. In fact, it was probably time to talk. The girl he was hanging out with had hinted as much.

"Yeah," responded another student, "D. T. R." I looked at the three other people around me, all of whom were nodding matter-of-factly.

D. T. R. ? Uh, what's D. T. R. ?

Define the relationship, that's what!

Am I the only one who didn't know? Always eager to expand my horizons, I googled DTR as soon as I got home. After getting past Diesel Truck Resource and Data Terminal Ready (and who could care about either of those?), I actually found it.

After considering this delightful new (to me) acronym, I decided that I myself have attempted to DTR. I think it counts, even though I didn't know I was trying to DTR when I did it. And when was that?

I seem to recall it was right before my high school boyfriend dumped me. Coincidence?