Should I just let it go?

I met this woman at a time in my life where I wasnt looking for a relationship. She and I hit it off instantly, lots of chemistry. However, even before we were actually involved she constantly talked about her ex boyfriend of 5 years. Things they did, sexual things etc...
Once we became a couple the floodgates opened so to speak, even more tales of old boyfriends and sexual promiscuity. For example, I have a friend who likes teenage girls. One day we were talking about this, and she told me of her first time at age 14 with a 21 year old man. She also told me she had never been with a certain type of man.
Well she has extreme difficulty having orgasm, I pull out all the stops yet mostly nothing happens. This, coupled with the constant tales of sleeping with "mass dudes"(her quote) admittedly offends me to no end.
The reason for this is I didnt have a laundry list of sexual conquests, something I was raised to hold dear. In truth, I had sex with 2 girls before her. I thought alot of this was due to double standards(I.E. man does it, hes a stud, woman does it,shes a whore.) but it is my own thinking.
Truth is I feel cheated by this, I had ideas of what I wanted from a woman, and she meets almost all those standards, minus "freshness" so to speak.
Recently, she told me she had sex for the first time at 12!!! Not 14 like she said. Also she was fustrated at not having orgasms, so she told me about her first orgasm at age 21 with a certain type of guy.(That she supposedly never had sex with.) Lastly, she told me we couldnt kiss for a few days because of herpes simplex. She swears she told me about.(She didnt.)

I certain of that because my memory is flawless. Thats three things that I discovered were lies. Should I let it go or get a new girlfriend?
I dont want to seem or actually be shallow, but sometimes all I can think about is her F-ing "mass guys" and get so ticked off that I dont want to even touch her at all. She gets irritable if we dont have sex for a day and a half. I have no idea how to make myself feel better about this. Dont get me wrong, I do love her very much, just not the taint....