Having sex with my manager
going back 30 years ago

I'm 17, my manager is like 30. I have a boyfriend in my grade. I work as a waitress at a restaurant/bar, and I noticed when I wear more revealing clothes, I tend to get more shifts + tips. My manager is kinda protective, and I saw him as a friend. I would even go to him for relationship advice.
One time, I felt insecure with my boyfriend and I was talking to him for advice. I drank a bit, and he kinda told me things that made me feel loved. He then kissed me, and I kinda kissed him back. He touched my breast and finger me, while I gave him a handjob. A few days later, I tried to bush it off as a mistake. He didn't want to stop, and somehow it develop into me giving him blowjobs. And from there, he said he wasn't just satisfied with only my mouth. He lifted my skirt, took off my panties and penetrated me.
Since then, I will spend the night with him every once in awhile. I'm not going to lie, I enjoy it. I know it's wrong in many way.