Decisions, Decisions, Decisions!!

How you choose between two decisions when both will affect your life forever? I have been seeking God over the last couple of weeks about a certain life changing topic. It seems as soon as I get to where I am ready to make a decision, something happens and I change my mind. It is like I have that anxious moment all the time. I think that the problem is that I get way too emotionally involved with everything. It is part of my DNA I guess! It is so frustrating sometimes. Does any body have any suggestions, on how to decide between to really big decisions? Let me know!