Thank you!
Part of dealing with heartbreak is having the proper mindset and the right attitude. Having both allows us to deal what what happened and then to move on in life to the next opportunity. Even if we know this intellectually (whether it's by reading or by learning from the experiences of others), emotionally we react as if we don't know that.
It's OK to feel the pain of heartbreak for some initial period of time; that's only natural. Beyond that period, feeling the pain of heartbreak is a choice we make, and it's a counterproductive choice: we're choosing to be miserable, and why should any of us do that to ourselves? Some of us learn this sooner than others, but the expectation is that we learn this lesson sooner or later.
The end of a relationship is also an opportunity to be in another one. When relationships go well, we take them as far as we can for as long as we can. When relationships go seriously wrong, where we know it's going to end like a car being driven into a ditch or a train getting derailed, we need to end those relationships as quickly as possible.
When it comes to family, it's a bit different since we are family for life. In that case, we need to find ways to forgive family for any wrong done to us and then we start over with family.
We're not going to get another self, so we have to love ourselves. Even then, we still need to be critical just enough to know that we did wrong and need to do right, that we have a flaw which needs fixing or supervision. We tend to be our own worse critics, and that can harm us in the long run. We know what we need to do, and when we deviate from the path we make course corrections to return to the path. We need to do that when it comes to loving ourselves.