No, God hasn't turned His back on you, nor will He refuse to welcome you if you turn in faith to Him. The Bible says, "He is patient with you, not wanting anyone to perish, but everyone to come to repentance" (2 Peter 3:9).
In fact, one reason I know God wants to receive you is because He hasn't let go of you. He hasn't allowed your life to come to an end, nor has He allowed you to be satisfied with your unbelief. The person who is in the most danger spiritually is the one who feels no need of God and has no interest in Him. But God is speaking to you right now, and I pray you won't shut your ears to His voice. The Bible warns, "A man who remains stiff-necked after many rebukes will suddenly be destroyed—without remedy" (Proverbs 29:1).
This is why I urge you not to delay any longer, but to confess your sins to Christ and ask Him to forgive you and come into your life. When you were a teenager you made the mistake of saying "No" to God; don't make that mistake again.
Instead, pause right now and give your life to Christ. Your life would have been much fuller if you'd done it years ago. But it's not too late to do it now—and ahead of you is a whole eternity to praise God and serve Him forever.