Wa Alaykum Assalam Rahmatullaahi Wa Barakahtu
It is said, that when a person feels true regret from the sin he has committed, and he never ever wants to go back to it again, feel it as if Allah has forgiven that sin. because the condition for true repentance are 3.
In case a sin related to Allah, which does not involve anyone else, is committed there are three conditions for the repentance of the sinner to be accepted:
1. That he refrain from committing the same sin again.
2. That he feel ashamed at what he has done. 3. That he makes a firm intention of not committing that sin again
Source
Remember brother that we all commit sins, day and night, but we have to realise that we should repent when we feel it in our heart, because Allah's forgivness and Mercy encompasses all.
May Allaah guide us to repent from our sins, Ameen.
Assalamu Alaykum Wa Rahmatullaahi Wa Barakahtu