Do Verbal Agreements hold up in court.

I started a Ecommerce business with a investor 2 years ago. The investor opened a new LLC under his name. As per our verbal agreement I was suppose to do all the work and he was just a investor. After reaching 2 million in sales I was suppose to get 50% Stake in the company. I did all the work for two years and now when the company is doing well and we have reached sales of 3 million he is backing out of his commitment. He is refusing to accept any such agreement. I want to know is there a way I can fight legally and get my share of the company. There is no written proof of as such and no one else knows about our arrangement. He paid me very less salary during this period. I worked for 100 hours a week and got paid for 30 hours a week. He assured me that he will pay me through equity and now he is refusing to do so.