>Ok to give some context I was an 18 year old short skinny female and a virgin.
And what are you now? A 100 year old fat lady?
I mean, come on, you don't get old or fat when someone tries to stick their dick into your mouth, you know? You don't even lose your virginity. All in all this introduction was simply stupid.
Since you wanted to know if it was your fault, I'd say it was for some reasons
>>2 mentioned. Plus, you should expect that someone who is into BDSM might have a sadistic side and might like to force you into doing things you don't like, you know?
Reality is sadly not comparable to fifty shades of gray, even if you might wish it was.