I don't feel that way at all. I think it's stupid to get upset or p*ssed off about something a person did before they even knew you existed. Or if they knew you existed, before they had any kind of relationship with you. That's essentially the same as getting upset that they can't see into the future. It's not like she's the 'judge' sitting there in a courtroom, trying to choose between you or the other guy to 'win the case', i.e. sleep with, and picks the other guy right in front of you.
Just... I don't owe anything to someone who right now is a faceless stranger. No one has any rights to my body until I decide they do. I also don't expect guys to just KNOW I'm going to be in their lives at some point [when *I* myself don't even know I'm going to be in their life], and put their lives on hold until then.
Stop feeling entitled and expecting things from people. You'll find yourself getting upset a lot less often. Do you know how irritating [and occasionally hurtful] it can be to have someone constantly bring up and sulk about how they wish they could have been / should have been the one to take your virginity? Bringing it up once, just to get it off your chest and tell the person how you feel, sure. Anything more than that is a guilt trip and a half. Bringing it up over and over again makes people feel bad. Whether bad is p*ssed off and annoyed, or upset that you're so upset. Either way, it's a conscious or subconscious effort to have them 'making it up to you' for the rest of your relationship, i.e. 'owing you' for that ONE thing, you always being a step ahead or having the upper hand. That's what it equates to. And I don't know how that could possibly sound fair to you. It puts virginity [or 'possession' or 'marking one's territory'] on such a pedestal that it can sour any budding relationship, and it also suggests that when it all boils down, a girl's worth in a relationship or as a person is primarily measured by her virginity. Personally, I won't stick around long with a guy who exhibits that kind of nagging to me about my life before him.
I get it, feel how you feel, because you can't help that. But what you CAN do is not press the issue, or you can think about what mentality in life has caused you to react the way you have, and try to change that mentality.