Why do we often feel the need to pretend everything is okay financially in front of our parents, even when it’s not?

She told me she needs to take a step back. One of her friends died. So she said she can’t give me all her energy right now and said she doesn’t know if we’ll pick things up again when she’s in a better place or not. Am I wrong to think she’s lying?
Have you ever had a friend who mysteriously forgets their wallet every time you go out? How did you handle it?
Why won’t he just admit to cheating on me several times with several girls? He broke up with me for nothing and my soul just needs the truth so I can heal the right way and learn to trust again.