what?if his penis went into your vagina you are not a virgin...

nope....... You're not a virgin.
Once insertion occurs, the thin skin covering the opening to the vagina is broken. That is what causes you not to be a virgin any longer.

if penis enters vagina, then you are no longer considered a virgin, whether he ejaculates sperm or not does not make any difference, its the penetration of the vagina by a penis that decides if you are still a virgin or not.
But in your eyes, if it were a short experimental encounter, and you were not aroused to your climax, you may wish to think that until you have proper sex, you still are a virgin , but technically you are a virgin no longer.

If you want to be a virgin and looking for assurance, you could look to see if he went in all the way or just the tip or whether he broke your "hymen," the thin covering that women have before it's torn (in sex or other strenuous acts). If he broke your hymen, you aren't a virgin. If he inserted us the tip and didn't go any further, that's debatable...