Ok, then, why are you going for a 120K/year job, which will most likely destroy your soul after a few years, as all corporate jobs do, if you have "several potential customers" worth 40K/year each?

If you knew for sure this thing was worth what you say, you would stay. But it's not worth that, it's imaginary, and you know it.

Tbh, I'd just move on. Learn from the exp. etc. You deserve to get what you want, and the other guy deserves a real co-founder (no offense to you).

Just go find new things to do, also you mentioned you were in college, you still have like 100 shots left to take on.