There will be many steak-and-mushroom-sauce-devotees responding to this thread due to their beliefs being threatened.
Don't listen to them.
I've been vegetarian for 8 years. I eat amazing food, am super healthy, and would never go back - meat disgusts me. You need to learn how to cook/eat properly now. It's tough in the beginning, because it's completely new, but with enough willpower you will look upon this as one of the biggest steps you've taken in life.
"Vegetarian food leaves a deep impression on our nature. If the whole world adopts vegetarianism, it can change the destiny of humankind." Albert Einstein
"You have just dined, and however scrupulously the slaughterhouse is concealed in the graceful distance of miles, there is complicity." Ralph Waldo Emerson
"Alas, what wickedness to swallow flesh into our own flesh, to fatten our greedy bodies by cramming in other bodies, to have one living creature fed by the death of another! For as long as men massacre animals, they will kill each other. Indeed, he who sows the seeds of murder and pain cannot reap the joy of love." Pythagoras
"We can judge the heart of a man by his treatment of animals." Immanual Kant
"Non-violence leads to the highest ethics, which is the goal of all evolution. Until we stop harming all other living beings, we are still savages." Thomas Edison
"My refusing to eat flesh occasioned an inconveniency, and I was frequently chided for my singularity, but, with this lighter repast, I made the greater progress, for greater clearness of head and quicker comprehension. Flesh eating is unprovoked murder." Benjamin Franklin
"I have since an early age abjured the use of meat, and the time will come when men such as I will look upon the murder of animals as they now look upon the murder of men." Leonardo da Vinci
"A mind of the calibre of mine cannot derive its nutriment from cows". George Bernard Shaw