Boulding missed a series of guilt edged chances before Eric Sabin's late winner. The frontman, however, still believes that Town are on the verge of hitting top form and storming to promotion.
"I think we're only just starting to find our feet," Boulding told the Grimsby Telegraph. "There are no strong sides in this league. There's no one team that look like they'll run away with it.
"Swindon are the strongest team that we've played and we should have got something against them.
"There hasn't been any one side so far that has been really impressive.
"I think it's anyone's league. If one team can get their act together and string some results together, then they're going to go up.
"QPR aren't a bad side but we were better than them. I suppose that's the only positive that we can take out of it.
"They're one of the favourites for the title, but we were the better side. We've got to pick ourselves up."
Boulding also admitted that his current goal drought is not worrying him.
"I'm getting chances but I feel like I've been unlucky not to score on a few occasions," he added. "At least I'm getting the chances. When you're not getting the chances, that's when you start worrying."