This signifies the end of one phase of your life into another. Though the guy holding the gun uses pressure the first time, nothing happens and this is symbolic of the struggles you are going through. However, when you finally accept the fate, the gun goes off and it is at this point that you see blood. Your friends and fiancé witnessing this is an indication that they are the people you can trust in as you start your new life. You are transported to a different scenario with flowers and this is an indication of the success you are going to record. Your deceased mother however is an indication you have not accepted her death and if you want to achieve your whole potential, you need to embrace these changes and what her death means to you.
Interpretation #2 by Anonymous
Do you talk a lot ? :) I mean this in the most respectful way. I see you post quite proficiently, I imagine you also express a lot verbally, or your mind might be very busy, like the gerbil on the wheel.
Sometimes we talk in order to calm ourselves down and/or to try to control a situation. I think you are going through a major transformation, and you are getting in touch with higher dimensions (like the place where dead people are) , but what helps you get there is calming down your throat chackra a bit. Then you will be able to feel and see these other dimensions more easily.