I maintain an open source project with ~2k stars (https://github.com/kyleconroy/sqlc). There’s a large list of bug reports and feature requests, but since I don’t work on it full time, I’ve gotten really good at saying “No” and “I’m sorry”.
Your project is somewhat similar to sqlboiler, but not quite the same. You may want to link to it as a complement or alternative when you think it would do a better job of what someone is asking for.
Is there anything preventing you from adding other maintainers to the project?
You can probably leave the sorry part out. There’s nothing to be sorry about :-)
Text is ambiguous, overtly communicating that you aren't trying to be mean is a good idea IMO.