I presume "she" is your wife from whom you are separated.
You say she left you 8 weeks ago, so this is still all very raw and recent.
I don't know that you can do anything much. You could ask someone to ask her to move, but presumably where she is living now is somewhere she's chosen and she is wanting to settle. You can't make her leave.
I think you need some time to get your head round this. I do understand as my husband left me to live with someone else nearly 9 weeks ago. He still comes round to the house to see my sons and get stuff and I find it very difficult to see or talk to him.
You have to accept that you will have lots of painful feelings, but they will pass. Don't spend your time worrying about whether or not you will see her, try to do something positive towards making a new life. It doesn't have to be major, just small steps like arranging to see a friend or rearranging your furniture. Action and activity are very therapeutic.