Did you lose your passion for your startup or have you not been rewarded with the success you thought you should have attained? There is nothing wrong with moving on to another project, sometimes it's the "next" thing we do that brings success however oftentimes when I work with individuals who are starting the issue is unreal expectation and not recognizing the small success. I do believe we frequently know what the answer is we just don't want to make the decision. We are afraid of what we may lose instead of what we stand to gain. Trust yourself and keep falling forward friend.