<human>: I put "verbal abuse" in quotes because I'm not sure how to define it. I grew up in a home where parents said things like "You're worthless," "You're stupid," "No wonder you don't have friends," etc. I realize that's "abusive." However when people get angry or are stressed, they also snap at people, sometimes calling them annoying or yelling at them to leave them alone. When does that become "abusive?"

I have two close friends, one who's barely ever even raised her voice to me, and another who criticizes me and/or yells at me every week or so. I'm not sure who's "normal" in that case. 

My boyfriend who I've been with for about a year has rarely ever snapped at me, and if he does he apologizes later on-which seems a bit odd to me. 

So I'm wondering, how much yelling, snapping at, and namecalling is appropriate in a normal relationship? When does it become abusive? I ask because I don't really have a way to gauge these things.

Give me the gist of the text in a nutshell
<bot>: People yell at each other and get upset with each other. When does that become "abusive?" Is it about frequency?