My son ask me to go away and prefers dad over me.

I just feel like I'm such a failure. Whenever he cry or throw tantrum , he will prefer his dad and whenever he sees me ard, he will ask me to go away. Am I really such a bad parent ? And my husband will just ask me to go away too cos he doesn't want me to agitate him. It just hurts me alot. Like I'm a nobody on this household. I know its stupid, but I'm under so much stress that I have suicidal thoughts.