Losing someone can be devastating, especially when the loss is someone that you loved deeply or admired. You can find losing someone quotes which may help to occupy your mind and understand how others have felt in a moment just like yours. The fact of life is that no one stays forever, everyone must pass on from this earth when it is time. Losing someone can be incredibly painful and take a considerable time to work through, but the alternative is to have never known the person at all and that is not a better choice. Eventually the grief will start to subside after losing someone and then you can remember the good times and the positive traits of the person without ending up in tears for hours.
Some people will learn how to appreciate you by losing you. Go where you are celebrated not tolerated. If people treated you like an option, leave them like a choice. You're worth being loved and valued.