How can I control my sexual urges since I am unmarried and single?

Assalamualikum brother and sister, I am so ashamed to ask for a solution to my problem, but I hope I can get an answer. When I was like around 12 years old, I was sexually harassed by a married man. That time, I didn't knew anything about sex or about kissing. So, I was harassed for a few months and I never protested or pushed away that man because I didn't knew what he was doing to me. The only that I knew was that I hated what he was doing to me. After a few years after the sexual harassment, I got to know about sex and began to regret everything that he did to me. I began to feel impure. We never had sex or he never saw me naked. But he did touch me and that made me feel so impure that I couldn't stop him from doing those things to me because I didn't know what he was doing to me. After that, I began to get high sexual urges. I tried to stop myself, but I had friends who would read books containing mature scenes. I began to read books with mature scenes and my sexual urges began to rise more. I didn't want to have sex before marriage as it is haram, so I began to write books where I wrote highly sexual scenes. I even watched videos with highly mature scenes. A few months after I wrote those books and published it only under my pen name, I felt guilty and I stopped writing those books. I even stopped watching those mature scene videos and I kept myself busy which is why I stopped having such urges. But recently, I am 18 and even though I am busy, I get really sexual urges. I don't want to commit the sin of having sex before marriage, but, I don't want to get married right now. I know that marriage is a solution but I feel like I am too young for marriage and I feel so impure and ashamed of myself. I even feel like when I get married in future, Insha Allah, my husband might hate me. I don't know what to do, so it would be helpful if you have an answer for me.