Just let him know that you apreciate him. Tell him you do, or tell him that he just really makes you happy, or that he has been really supportive. None of these things would 'scare' anyone.
Your feelings of love and graditue towards him may be incredably intence, but try wording them like a common compliment. At some point in your relationship you will feel comfortable telling him how seriousely he has effected you life.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.