try to dig thru them to get to the underlying causes, and then let them go.
Do you mean the trigger or the reason behind why I feel so upset/sad? I struggle to pinpoint the underlying cause at times, usually its because I miss him, so loneliness I suppose?
The trigger is usually reasonably easy to figure out....but the underlying reasons can take some digging. Sometimes it's simple...sometimes it's not. And it's not always the same each time. Peel back the layers.
You could feel a lot of things....anger, guilt, loneliness, resentment, confusion, anxiety, betrayal, fear, disappointment, etc. So feel it...and then dig into it. Why are you feeling this way? Where's it coming from? And then let it go. And then move forward in a way that leaves that feeling behind you.