I really very scare things that i have done will be find out

I really scare things that I have done will be find out one day and everyday I was thinking of ways to return back. This is because I don't want things to be expose out by her. I really have no choice this is why i am doing this things but now I really don't know how to stop all this things and stop every things from happen. If one day she found out and if she send me to jail, I am prepare for all the things that happen and I am ready for what is going to happen sooner. I really this things don't be happen forever and she won't be found out anything from me and find out what i have done... I really feel sorry about it and don't want things to make it big.. I really feel that i am doing this things but the reason is I really have no choice that why I am doing this. What I can do now is find ways to return her back.. I really very scare that things will happen and will make me can't stay in this house. I know what I done wrong. But this is only way I can do. I really don't want to leave this house.