Losing virginity

I’m supposed to hang out with this guy tommorow that I’ve been talking to for a while and he offered to take my virginity and I’m 18 and I’m definitely ready, so basically I know he probably only wants me for sex and some of my friends are like really down for it cause they know I used to/ still do have a crush on him and then some really don’t want me to cause it’s “just a bootycall” but like I already know that and I’m the one letting it happening, they’re all giving him shit about only wanting to hang out with me on like Friday nights at midnight, but like imthe one that made the plans ?? I brought it up and I’m doing the same thing?? I don’t get why I’m a lot of these situations the guy seems to be the bad person, like yeah he could ruin my life, but I’m the one who brought it to this point lol I’m fine with it and I want to do it so why are some people so against it??