Hi John,
Could I get forgiveness for my sin? Is this still forgivable?
Yes!
Let's put some scripture to it...
Isa 1:16 Wash you, make you clean; put away the evil of your doings from before mine eyes; cease to do evil;
Isa 1:17 Learn to do well; seek judgment, relieve the oppressed, judge the fatherless, plead for the widow.
Isa 1:18 Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
Isa 1:19 If ye be willing and obedient, ye shall eat the good of the land:
Notice verse 16, repentance (the desire and action of not sinning, but of doing right) is the first step.
Also, one must believe on Christ...
Act 10:42 And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead.
Act 10:43 To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins.
This verse sums up the process...
Act 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
All manner of sin can be forgiven except blasphemy against the Holy Spirit. Now a one time mistake is not an attitude and way of life. One who is willing to repent and trust God WILL be forgiven...
Heb 4:14 Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us hold fast our profession.
Heb 4:15 For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin.
Heb 4:16 Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
Don't be afraid, go boldly to God and ask. Christ's primary job for the last almost 2000 years has been to provide forgiveness...
Heb 7:25 Wherefore he is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them.
He sits at the right hand of the Father and intercedes for us when we falter, when we fail, when we sin. He is our advocate...
1Jn 2:1 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
1Jn 2:2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
This scripture gets repeated so often it sometimes loses it's effectiveness, but read it carefully...
Joh 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Now not only the world, but us individually. If I had been the only one who ever sinned, Christ would have died for me so that I can have eternal life. Same goes for you.
Rom 5:6 For when we were yet without strength, in due time Christ died for the ungodly.
Rom 5:7 For scarcely for a righteous man will one die: yet peradventure for a good man some would even dare to die.
Rom 5:8 But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us.
Rom 5:9 Much more then, being now justified by his blood, we shall be saved from wrath through him.
Rom 5:10 For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life.
Go directly to God in a humble, repentant attitude and He will forgive you.