I'm wondering if there is a specific reason you don't like being touched. But I agree with the others. You should see a therapist before getting married. It would do a lot of good in the long run. Touching is an important part of any relationship. I don't really like it either. I'm an introvert and live by "more is less". But in marriage or any romantic relationship, touching plays a huge part in it...it's another way of expressing feeling.
Good luck with whatever you decide.
I may seem small, but if you mess with my horse, I will break out a level of crazy that will make your nightmares seem like a happy place.