Not at all. "Everyone" doesn't mean "the majority of people" - "everyone" literally means everyone. There's bound to be more than a few people on the planet who are 100.00% straight.
Absolutely. Sexuality is a spectrum. Many studies have discussed this. Those who are 100% straight or gay, or right at 50/50 as bi are VERY rare. So, yes.
No. I've made out with other girls before but I have absolutely no emotional attraction to them and now the idea of getting physical with them is repulsive to me.