Has my hymen popped??? Tmi

So I'm still a virgin but my boyfriend of 3 years and I have been getting kind of serious. Lately I've been extra hygienic *down there* and I've noticed my hymen doesn't seem to be tight enough for a virgin. I've always been able to stick in tampons with no problem, and just to experiment, I was able to stick three fingers inside myself with no pain. Why am I so loose? I Googled hymens and it said some girls' might pop just from stretching/falling in childhood. I know popping a hymen is a pleasurable experience for a guy and I don't want my bf to question my virginity! Is there anyway to tighten up? Or how can I tell if my hymen is still intact?