Stephie, I am sorry you and Adrian are going through such a difficult time. I can understand both of your sides. After 9/11, I called to see if I could join the Army. I wanted to kill the SOBs who hit us and killed so many people around the block from where I worked. My parents convinced me not to do it. Who knows, if I did, I might be dead or might never have met Tina. I personally think it is quite an honour to be a part of the military. My country has gotten into battles in history that it probably should not have been in (Iraq, Vietnam) but at least we will never rely on someone else to protect our interests when we are attacked.
What I am trying to say is that this a life altering decision for BOTH of you. You both should think thoroughly before you decide to do it. Adrian should think of all of the consequences if he joines the British army and you should think about the impact it will have on your life.