Eternal ambiguity

I went for a run in Wellington, New Zealand, and the path back from the Botanic Gardens took me through the old cemetery, where I found this headstone:

Poor William - killed accidentally at age 29 but remembered by 'a few friends'.

But I have to wonder about the 'sincerely regretted' at the bottom. Do they mean 'geez, we'll miss you bro', or is it more like 'oops, sorry about that dude'? I guess we'll never know...