God doesn't waste pain. The creator of the universe would not let you she'd a single tear for no reason. Everything has a purpose, whether big or small, whether it affects you or someone else, now or in the future. So don't give up, every single tear has a purpose. If you need hel,p lean on God. He is a loving father who knows and understands your pain. He won't show you his plan or change the fact that this world isn't perfect but He will hold you when you're crying and guide you step-by-step. He is not human, that His emotions would change so suddenly and inexplicably. He is an unchanging, perfect being and He is waiting for you with open arms. Waiting for you to trust him, even if you can't see a purpose. God doesn't waste pain.