Help! Confused- I Am 20 But Dont Know If Am Still A Virgin

Confused girl doesn't know if she is still a virgin and needs 'psychological' help perhaps
I am 20 years old and I don’t know if I am still a virgin. When I was 9 years old, I did some romantic
stuffs with a boy and I don’t know if he penetrated into me or not. Since then, I have not had sex with anyone. Actually, I am thinking about doing it with the man that would marry me, although, I am still single. The problem is I don’t know if I am a virgin or not, please help!