Ask HN: I have a startup idea, the project is 90% done. But..

Hi everyone! I'm malaysian. Going to gradute in CS soon. Currently I'm working alone on my own web project in purpose to run a startup right after I've finish my last day in CS faculty or maybe before the last day. But the problem is, I always doubt at my own ideas and potential to execute the idea. Yes, I'm ready to take any risks but at some times, severally, I feel unmotivated, uninspired any more because of my surroundings and friends network are not really into realistic interest in entrepreneurship. Any positive constructive advice on how to overcome these emotional obstacles, how to manage poisonous unmotivated people around and how to stay persist on what I believe will work. That's all. Thank you.