Second, be optimistic. Thousands of books are published each year and thousands of authors are necessary to make this possible. Publishers need potential authors like you. Third, get a literary agent. Just like interviewing for a great job is easier when you know someone on the inside that can put a good word in for you, an agent greatly increases the likelihood you will get published.
Agents act as an established reference whose job it is to gain consideration for their clients.
They will screen books and, if they like what you have to offer, will submit them for consideration to a publisher, banking on their credibility to sell your book. Keep in mind that all this comes with a price. An agent, like any other employee, expects to profit from their work. Without an agent, it is harder, but not impossible. You have probably applied for a job without ever having met anyone who works where you want to.