I do think I have a sex addiction.

That's also why I really do think is a problem with me (for sure not with my partner), and no matter which any other woman with whom I would have been in a relationship with, I would have done similar.

I told my fiance I think I am somehow "obsessed with sex" (even tho I do not think about it all the time, and I have days when I really would not want to cheat, neither have the mood for no matter which woman to have sex with)

I also told her that I can make sex with other women, but I see them like a "pizza" - with no feelings at all, just to use for my addiction - something that I like.

We somehow discussed this and I think she knows I did oral sex with others. I do not want to share everything with her because it will only hurt her - I do not see the purpose to give all this details. Of course also because I fear she will eventually dump me.

The problem that made me cheat in the first place I think is also that I did not found this as something very bad.
In my mind it was not something very wrong - just like I want to eat a very good meal, like that I wanted to do some fantasizes with some other women. Things I find exciting only if it is with a woman I have not did anything sexually yet.

Now is somehow the same - I sometimes have strong urge to do something like this and find it difficult to retain myself

I fear not to become more and more obsessed with this, to hurt my fiance, lie to her, to lose money without purpose etc