How do I know if I was groomed?

When I was 14 i met a 21 year old and we soon became a couple, the only thing that makes it weird is that i did lie about being 18 but also I looked 12 at the time. He got me on drugs and then at 15 he “found out” that i was underage while he was 22 but he continued to still have sexual relations with me. Two weeks ago (i think) he just told me that he cheated on me with a 17 year old and I talked to his friend from high school and she said he’s always dated people who were younger. Ask for more details i wanna keep this as unemotional as possible