Marriage Sex & Seperation, Adultry.

she tells me dont worry its nothing funny goin on, I let it ride but i knew she was decieven me..She has been gone every since. Now, do u think she left me for this other married man so she can be his bootycall? I have tried to make these thoughts go away but I need closure on this matter..She tells me she dont want a divorce right now just a break from the marriage.  Tell me your thought's on this I really need to know.