Sitting beside a running river, do you need to detach yourself from the fish swimming by?
They come and they go.
Your emotions are already unattached to you. The problem does not lie in emotion but rather the way in which you relate to your emotions.
When you mentally cling to certain emotions in order to maintain a sense of normalcy or self, you are enacting delusion. When you avoid certain emotions because of the way they confuse you and cause pain, you are again trapped in delusion.
Through the practices of daily meditation and mindfulness, you acclimate yourself to staying right where you are regardless of whatever you are feeling. In this way, you can experience the full range of feeling even while knowing for yourself that you are more than any emotion.
That is the beginning of peace.
I would also recommend the book The Power of Now by Eckhart Tolle.
Without calmness of mind, it is very hard to have a sense of delight. Without this sense of delight, there is no genuine compassion. If we are totally preoccupied with our own experience — how I feel, what my problem is, and so forth — there is no chance at all for us to care about how others feel. There is simply no room for compassion.
from the book “Fearless Simplicity: The Dzogchen Way of Living Freely in a Complex World”