In a large city, five miles may cross dozens of neighbourhoods. Around Dumfries, the same number tells you very little. The useful question is not simply how far away someone lives, but whether the journey fits around work, family, buses, winter weather and the possibility of meeting regularly.
Start with the area you can cover without resentment. For some people that will mean Dumfries itself, including Georgetown, Lochside, Calside and Heathhall. Others will reasonably include Thornhill and the Nith valley, Annan, Lockerbie, Castle Douglas or communities along the Solway shore. If you drive, Carlisle may be easier than parts of central Scotland. The border is an administrative line, not a dating rule.
A practical local match is someone you can see again without every meeting becoming a day trip.Be clear in your profile. A line such as “Based near Dumfries, happy to travel towards Annan or Carlisle” is more useful than describing yourself as willing to go anywhere. If you depend on public transport, say so without apology. It helps both people suggest realistic times and venues.
Widen your radius gradually if the initial results are limited. Dumfriesshire has a smaller population spread over a large area, so a very tight search can hide suitable people. That does not mean accepting endless travel. Think in journey times rather than circles on a map, and remember that a quiet rural road in July can be a different proposition on a dark January evening.