I have never actually put this into writing so bare with me

For as long as I can remember, I've had pet peeves like most do. These pet peeves control my entire life. It's what consumes my day, and makes me so angry. An example of one of them would be someone smacking their gum. If this happens around me, I totally lose control inside my head. I imagine harming the person, even. I can't think about anything else while these "pet peeves" are going on. It's gotten to the point where I have hit family members over it, and cried over. I have never questioned this and have lived with it for most of my life. My family knows about it (and think I just need to get over it). But it was not until yesterday when I finally told my friend about this, when she suggested I may have something mentally wrong. Any thoughts?