Act as if she is not coming back. Act as if you are happy. (No matter what W is doing) You are a strong man that owns his own happiness.
The key thing is to prepare yourself for the possibility that it may not work out with W by GAL. You don't need to fake having a great time you just need to keep working on YOU and let the results show to W. Let her see what she is missing.
No matter what happens your stress will be reduced and you will be stronger for it.
