In order to make a relationship work, you have to invest a lot of time and energy into it. The more work you put into a relationship, the more it affects your entire life. If you've invested a lot in a relationship with someone it can be hard to let go. This is especially true if children are involved or if you are worried you haven't really tried hard enough to make things work. It's also hard to be alone and if you haven't been single in a long time it can be scary. And depending on how long the relationship was, there may also be property and money that has to be divided up. But if you aren't happy in your relationship it's important to end it.      Knowing when to end a relationship is a very important skill. Knowing when to end things will help you cut your losses, stay mentally healthy, and move on towards the relationship you deserve. If you stay with someone you don't want to be with the truth is you aren't doing anyone any favors. You deserve to be happy and so does your partner.  …