Do you honestly believe there is no such thing as right and wrong? Frankly, I doubt it. If someone came up to you in the street, for example, and threatened to kill your baby, I seriously doubt if you'd simply shrug your shoulders and say, "Oh well, if you think it's all right to kill my baby, then go ahead. Your opinion about such things is just as good as mine!"
You see, within every one of us is some idea of right and wrong what we sometimes call our conscience. Down inside, we all know it's wrong to cheat helpless old people, or kill defenseless children, or commit genocide against a whole ethnic group. But where did that sense of right and wrong come from? The Bible says God gave it to us. We were made in His image, and although sin has marred that image, we still know that some things are right and some are wrong.
But the deeper issue for you is this: Right now, God has no place in your life. If He did, you'd be concerned about doing His will instead of living as if He didn't exist. But He does exist and not only that, but someday you will stand before Him to give an account of your life. The Bible warns, "Man is destined to die once, and after that to face judgment" (Hebrews 9:27). Don't gamble with your soul, but open your heart to Christ and discover the greatest joy of all the joy of knowing God.