I think my coworker thinks I hate being touched but I love it.
Why are they touching you and why do you secretly like it?
My first experience of touch was brutal and painful and was more like an attack than a touch.
It is not good to lie to your coworkers it might cause problems later on. You don't have to tell them everything just not lie.
I'm going to make a big deal of it and tell everyone since I am tired of pretending on this. I hate having to hide what I truly feel.
Then you should stop lying and tell them the truth, although they are your coworker and they shouldn't be touching you, as that can be a form of sexual misconduct. If you prefer being touched by this coworker, make sure you guys do it outside of work and make sure that both of you consent with whatever activities you will do.