I feel like i need to put on a fake face and be happy.
Why would you be disingenuous about your attitude?
I'm just not feeling good about my life right now
While being positive about things is definitely a good attitude, it's not healthy to just fake it.  Hiding your feelings is never good, find ways to resolve them like speaking with a therapist!
This is too much to deal with, I'm just not thinking correctly
If you are really hurting it is bad to burry your emotions. Eventually you will need to deal with them. Can I suggest talking with a therapist?