100% yes, considering he was a straight up self insert haha. Back in the day I would draw cartoon versions of myself and my friends just for fun. When I went to write my one-shot I decided I didn't want to spend a ton of time designing a bunch of new characters (because it was intended to be just a short and quick practice comic) so instead I reached back and grabbed some of those characters to use. Spent a little time updating them to my current style and fixing their outfits (they're still silly, but the versions from highschool were far sillier xD) and rolled with it.
Here's a version of them from 2010:
and from 2018:
The dark haired one in the back, Rudolph, is also a friend character (not depicted in the first image) but I hadn't drawn him very much prior to this story lol
The new project I've recently begun work on has a MC that doesn't resemble me that much though. I'm sure as I continue to develop her she'll probably borrow some aspects but generally speaking not a 1:1 copy xD here's an early sketch of her:
(and my one-shot as mentioned above: