Can i play this game only either sexless or turning into a sexaddict ?
Is there no option to play as a dominant that uses sex, but doesnt get turned into an slut ?
I think any sex actions will increase slut level eventually, but as to what effect that has, I can't say. Because unlike other games, there's not just a single stat that affects scenes/options/dialogue, but several: Slut level, Sado/Maso and Passives. Avoid picking up passives for fetishes you don't want and you should be fine. The game's content is broad rather than long right now, so you shouldn't have a problem keeping in check stats you don't want until the end of Level 2. Also accessories can be used to increase/decrease sex act requirements to your liking.
But overall, if you really just want to play as a sociopathic detached dom throughout the game, it's not an option. The whole conceit of the game is Karryn has a libido cranked up to 11 on entering the prison, and performing/allowing any sex acts will make her develop a fetish for that act pretty quick through Passives as well as increasing the overall Slut level. Both of which means lower requirements and more Desire/Pleasure gains.