Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh

 

In the Name of Allah, the All-Merciful, the Mercy-Giving

 

All praise is due to Allah. Peace and blessings be upon His Messenger Muhammad.

 

What you did was wrong and you felt remorse over your action. That is a good sign. You need to repent and ask the forgiveness of Allah. Sincere repentance entails three steps: feeling deep remorse over your sin; refraining from it immediately and resolving not to do the same.

 

If you can afford to, you may give some charity to the poor to expiate for the same.  Once you do this, you can hope for the mercy of Allah.

 

Almighty Allah knows best.