I cannot stand being tickled, I will hit and try to get away too.
My mother loved to tickle me when I was a little girl, but it was so upsetting to me that eventually I figured out she just wanted to make me laugh, so I would start shrieking and laughing before she even tickled me, she would just make a tickle motion near my arms and I would start laughing so she wouldnt have to actually do it.
Then in high school when I started to have a boyfriend, he also wanted to tickle me but I couldnt deal with it, so to try to prevent it I just refused to be "tickled" and would never laugh or crack a smile or anything (easy to do when you dont want something painful to happen), and said I wasnt ticklish. This has mostly worked because if someone wants to tickle you and they get zero response, it isnt fun for them so they stop trying and you are safe.
In a more recent relationship, I felt that the bond of being ticklish was important, so I let myself be ticklish in one way (if someone blows air with their mouth on my stomach) because that doesnt hurt me at all and it is pretty funny.
That sounds really weird when I type it out like that, but I guess we all come up with survival techniques.