As-salamu alaykum sister,

While what you and he did is haram, it does not make you a bad Muslim. We all sin, that’s why in His mercy, Allah listens to our prayers. The fact that it bothers your conscious so much that you wrote to seek advice, is telling of your deep fear and love for Allah as well as your feelings of remorse. Allah is most merciful sister and as long as you have repented and asked for Allah’s forgiveness, I would try to put this behind you. Allah is most forgiving. In the Qur’an Allah says “If the person commits a sin and repents from it, then Allah accepts his repentance if it meets the conditions of sincere repentance. Allah Says (interpretation of meaning): {Say: “O ‘Ibâdî (My slaves) who have transgressed against themselves (by committing evil deeds and sins)! Despair not of the Mercy of Allâh, verily Allâh forgives all sins. Truly, He is Oft-Forgiving, Most Merciful.} [39: 53]”
I would kindly suggest sister that you leave this to Allah. If you repented, there is no need to keep carrying it with you, as you gave it to Allah. Therefore, it is wiped away meaning do not tell a potential future husband or your family. Allah covers our sins when we truly repent and we have no business to resurrect them. I suggest you move on with your life, focus on rebuilding your self esteem, getting closer to Allah and forgetting this man who had no respect for you. Insha’Allah, Allah has someone much better for you , someone who will not lead you to haram things but lead you towards Allah.
And while yes, it was your decision sister to do this, no one is perfect, we all make mistakes, we all sin. But who needs someone in their life who encourages us to sin? You deserve better.
We wish you the best, please let us know how you are doing.