HOW TO MOVE ON WHEN YOU FEELING DOWN ?

I've been study very hard lately and most of them was like work out but just one class that's not.It's not depending on how willing or hard work or even intention you are only thing that they care is you have to be super genius and perfect like 100% to pass this class so me and my bf fail for the first test but we almost did it but I dont care it now cause I have my bf with me and my many other classmate ,so I dont let it ruin any moment in my life ,so I wanna share you guys the quote or any suggestions I read or my fam just give it to me to keep moving forward on my life ! xx
Don't stop believing and dreaming always let go.Whatever will be will be life is yours.