“I saw this on cable in 2001, possibly 2002. On IFC I think. A guy borrowed money to buy his fiance an engagement ring and owes these two bad guys money but can’t pay. He and his friend are on parole. They go to rob a grocery store to get money the owner had in the safe to buy a boat. There was no money in the safe. The cashier had spent all the money on heroin. One guy shoots the cashier. The two guys run. The friend gets killed. The other guy and his fiance go on the run across the country chased by meth heads he owes money. They stop at her parents house and the parents give them LSD as a wedding gift.”
https://www.reddit.com/r/whatisthatmovie/comments/182he79/movie_made_around_the_year_2000/