So what about her ex huh? I think they dated for around a year. They had a dog together.
Her Ex has, is, and will experience the same crap you went through. Then she might show up with you again, albiet temporarily. Your questions are still fueled by ego.
"Why does EX get what I can't have"
"shes out living this awesome life now with no remorse. Like I was nothing."
Your grieving what you lost. The time you put into this.
I get it, 8 months ago I was engaged. 6 months ago I slept my first night In a camper (as i have done for the last 6 months) and had to rapdily pull my 8 year old son out of school, 3 weeks into a new school year, and put him in a new one.
It's easy to be angry about what you lost, or what someone else is "enjoying" in your stead.
Stop tying your happiness to her.
You were happy and content before you knew she existed, and you will be so again.
Women like this are The Moon, they shine only based on the reflected light of the Sun. They themselves have no illumintory power. The Moon is ever changing, mobile, and often absent.
You are The Sun, you generate your own light and heat, and The Moon needed it while in view. Now its your new moon, she is gone.
Its up to you what you'll do when she Waxes again, for as sure as The Moon shall rise, she will.