I find the thought of kissing another girl, or more, absolutely repulsive. For myself.

As I never plan to experience that, then I'm good! The thought of other people doing that isn't a problem to me, because it's not a problem to them. In fact, I'm happy that they aren't having to do something that they find repulsive (ie being in a straight relationship when they are homosexual).

It's ok to not even be interested in sex or a relationship. If you are happy with what you have on your own, then that's all good. It's what makes us happy that matters.

It's also ok to feel uncomfortable around things that you find different. It's good that you recognize how you think; it can help you ensure that you don't treat anyone poorly for having a different viewpoint from you. Because at the end of the day, we can't help how we feel about things. What we can help is how we act; how we treat others.