How can I overcome feelings of insecurity, jealousy and fear, from my childhood.?

There is a slight depression, anxiety and insecurity in your story. You have to raise your confidence, everybody deserve a good partner and good things in the world, here is a link for your to understand more, hope it helps: you may need to read some boosting self confidence book, sometimes it helps. More.

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.