What do you need a technical cofounder for? Like what is the critical piece for moving the product forward that you don't currently have?

You should continue to look for good people and size up if they would be a good partner. You should also start talking to investors. Not having a cofounder is just one data point.

I don't really believe in this one chance with an investor. A lot of them like to get to know you and your business over a span of time. It really does depend but seeking out good people (tech or otherwise) is always a valuable thing to spend your time on.

What area of the country are you in?