Whatever you've done in your life, no matter how bad you think it is, God still loves you. There is no sin God cannot forgive. If you have come to a point where you realize something is missing in your heart and life, turn to Jesus. I list the following in steps, not to be legalistic, just to acquaint you with what the Bible says about coming to Jesus. Being saved is as simple as uttering a heartfelt sincere prayer asking Jesus to be the Lord of your life. He will hear you. He's waiting with open arms.
The first step is to admit that you are a sinner. Being a sinner means you have done things in your life that are not pleasing to God.
For all have sinned and fall short fo the glory of God. -- Romans 3:23 NKJV
The second step is to believe that Jesus is God's Son. God sent Jesus to die in our place, so that we could spend eternity with Him. Jesus lived a perfect, sinless life and was crucified on the cross to make payment for our sins.
For God so loved the world that He gave His only begotten Son,
that whoever believes in Him should not perish but have everlasting life. -- John 3:16 NKJV
Next, confess your heart to God. Ask Him to forgive you of your sins and ask Jesus to come live in your heart and life. If you are unsure of what to say, you might pray something similar to this:
Please forgive me for the sins in my life. I believe you are the Son of God and that you came to earth as a sacrifice for me, covering me in your blood, and cleansing me in the sight of God. Please come live in my heart and be the Lord of my life. Thank you for loving me so much. I know you have a purpose for my life. I ask Lord that you teach me your ways as I learn to walk with You. I love you, Jesus.
It's as simple as that. God will hear you. He loves you and is waiting with open arms to welcome you home.