Yes, I agree with the thread title, avoiding people has led to big problems in my life, it just solves one problem and creates another, though at the time, its too tempting to resist avoidance.
Because my narcissistic housemate who seemed to love treating me like a joke, manipulating me, making constant digs at my already waning confidence and making me feel utterly crap and useless all last year, I now completely avoid her, which is a constant challenge, as whenever she's at home, she always leaves her door open, so there are some days where I can't even leave my room to go to the bathroom or kitchen because she's there and there's been the odd day where I was so scared of going home and seeing her, that I sleep in my car. Sure its uncomfortable and cold and I hardly sleep, but at least I'm spared of that horrible anxiety going through the front door for another night, which just shows the lengths I'll go to avoid situations that make me feel very uncomfortable, as whenever I unexpectedly see her, I panic and I was always forced to talk to her whenever I went through the door last year, and conversations were always the same, she'd go on about how amazing her day was for ages and then turn on me and find something to pick on.
And in avoiding her, it was near impossible not to avoid the rest of the house, so I avoid everyone now, including the last person here that I actually got on with, so I now go days and days without speaking to anyone and the isolation is sometimes painful and I feel so trapped either in or outside my room, yet I know I just need to keep going however painful it gets as I'm only a few months away from graduating. So, while avoiding people means I avoid getting hurt any further and I don't have all the social anxiety that goes with having friends and nights out, I'm left depressed and isolated instead, so avoidance in my case has created more problems unfortunately, I've just dug a great big hole for myself.