You really sound down T, Please know you are loved and needed by your children. Your wording scares me, please don't be alone. Is there someone you can talk to? This is difficult time but not the end of the world.
If your wife is considering or considering considering coming home, you must make the choice as inviting as possible. Work on your PMA and be the best dad you can be. Actions speak louder then words, show her.
Please keep posting, your thoughts seem dark. Stay strong and be well.