Virginity

So, I’m a 17 year old girl who is turning 18 quite soon, not that it matters. I’ve been thinking a lot lately about sex and virginity. I’m a virgin and though I’ve done a few things I’ve never actually had sex. I’m scare tbh. The person i was thinking of doing it with is my best friend. Our relationship is kind of less than lovers more than friends with benefits type thing. We are 2 people who like each other (ALOT) and have INTENSE make out sessions. I trust and love her but something inside of me is afraid that I’ll regret losing it to her.I’m not religious but my virginity is something so important to me. I feel like I’m giving a piece of myself to the person. It’s an energy exchange.We aren’t together because she doesn’t believe in high school relationships and doesn’t want to hurt me..what should I do?