You both are wrong. The text is quite clear. The apostles were given the authority to forgive and retain sins.
What is your position? Do you agree that various passages of Scripture should harmonize and agree with each other? Of do you believe that they should contradict each other, and in their contradictions form new doctrines that also contradict the rest of the Bible? Which position is more tenable. The study of hermeneutics always opts for the former. The latter position is the position of the cults, and is the reason that cults form--Scripture taken out of its context and the context of other Scripture and then taught to mean something that goes directly contrary to the teaching of the rest of Scripture.
Thus, in that light, one legitimate question has already been asked. Where in Scripture do you find any apostle forgiving anyone's sins? Can you provide any example? If not then consider your interpretation invalid.
Second, look at other similar passages. The passage under question is this one.
John 20:22-23 And when he had said this, he breathed on
them, and saith unto them, Receive ye the Holy Ghost:
23 Whose soever sins ye remit, they are remitted unto them;
and whose soever
sins ye retain, they are retained.
Are there similar passages, and what do they teach?
One parallel passage is found in Matthew 18
Matthew 18:15 Moreover if thy brother shall trespass against thee, go and tell him his fault between thee and him alone: if he shall hear thee, thou hast gained thy brother.
--The fault spoken of here is something serious.
Barnes says:
Trespass against thee. That is, injure thee in any way, by words or conduct. The original word means, sin against thee. This may be done by injuring the character, person, or property.
If he does not listen to you, then the next step is to take with you one or two others that in the mouth of two or three witnesses every word may be established.
Here is the final step:
Matthew 18:17 And if he shall neglect to hear them, tell
it unto the church: but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.
--The final step is excommunication. Notice that Christ is speaking of the local church. This is a matter of the local church. It is one of the first mentions of the church in the NT. It is directions on how the church is to deal with erring members.
Now after that Christ says:
Matthew 18:18 Verily I say unto you, Whatsoever ye shall bind on earth shall be bound in heaven: and whatsoever ye shall loose on earth shall be loosed in heaven.
Matthew 18:19 Again I say unto you, That if two of you shall agree on earth as touching any thing that they shall ask, it shall be done for them of my Father which is in heaven.
--These are very similar verses to those in John. They don't have the power to forgive sins. Verse 18 simply says that the decision that the local church has made God has honored. If they have made that decision to bind or excommunicate that man, then that decision is the same in heaven. If the decision was not made because of uncertain circumstances, then the Lord was with them also in that decision. Whatever the decision the local church made was also the decision of God.
Matthew 18:20 For where two or three are gathered together in my name, there am I in the midst of them.
--Notice this is not the definition of a local church. If it is a small church and two or three make up the quorum then that decision made by that small number of people is a binding decision. Christ is in the midst of them.
The passage of John 20 is very much like this passage. It harmonizes with the same type of language. It has to do with church discipline, not forgiveness of sins. Let us not make new doctrines by a misinterpretation of Scriptures which contradicts the rest of the Bible.