Getting rid of toxicity

Lately, and as I get older, I’ve been feeling this need to get the negative people out of my life/minimize my interactions with them. It feels kind of wrong, though.. I work in customer service and have for a long time and I constantly deal with and think about how much negativity there is, it really wears on my mental health but at the same time I’m good at my job and I want to stay at my job because I’ve been there forever but I feel like it’s so unhealthy for me as a woman of faith. It’s as if I’m being tested daily on if I can hold my temper and continue to be nice and understanding to people who treat me like I’m trash.  It’s not just at my job either.. my mother in law seems to be out to get me at times and I have yet to be disrespectful back to her but mannnn I do think about it. I want to try to delete that negativity but is it wrong to cut off people like that? I don’t really know what to do? Just keep getting walked on orrr?? I will continue to pray about it and lighten my heart but any insight from a kind faithful women would be appreciated as well :)