In the past, the word virgin, when applied to a female, has been used to describe someone who has never been been penetrated sexually by a member of the opposite sex. In that sense, you are still a virgin.
Some consider a broken hymen as an indicator. Using that standard, you probably aren't (although there are other ways it can be broken and some females are born without one).
In it's current usage however, virginity is more about sexual relationships than penetration. Under the law , penetration is still used as the standard but I suspect the issue of inanimate objects has never been considered.
In reality, whether the label applies to you depends on the standard being used by the person making that judgement. I'm inclined to use the relationship standard and say you are still a virgin but I'm sure there are some that would disagree.