Star racer Jessi Combs’ boyfriend says he’s “not sure how to cope” after she died in a fiery crash in Oregon while attempting to beat her own land speed record.

“I miss my @thejessicombs so bad. It’s a constant for me to be in our favorites file on my phone looking at our pictures,” wrote Terry Madden on Sunday in an Instagram post.

Madden — who was her North American Eagle Supersonic Speed Challenger teammate — said he planned to work through his grief by sharing photos of memories with the 39-year-old auto legend.

Alongside a snap from Halloween, Madden wrote that his evening with the former “Mythbusters” host was “the single greatest night of my life.”

“We had more fun than I knew it was possible to have,” he wrote. “Didn’t drink a drop and on the greatest pure happiness high ever, we laughed we loved and we never said a word.”

Combs — known as the “fastest woman on four wheels” — was driving her jet-powered car Aug. 29 through the Alford Desert when she crashed in a dry lake bed, authorities said. The cause of the crash is under investigation.

In a separate Instagram post, Madden said he couldn’t have persuaded his girlfriend to not attempt to beat her dangerous record of 483 mph.

“I know I couldn’t have stopped her if I had tried, and she did die doing what she loved but I’d give anything to have this all be a bad dream,” he wrote.