“You are the average of the five people you spend the most time with.” –Jim Rohn.
I’ve read and heard this quote many times and see evidence of its truth frequently. If you hang out with people who lack discipline, focus on the negative and shutter themselves with self limiting beliefs, you can’t avoid their effect on your attitude and outlook.
Your business is too important to be held back. Seek out friends who have qualities you admire. They will help you succeed. Negativity has a permanent gig as the front man for failure.