How do you do it?
One case at a time.. one step at a time. And expect to fall back
Everytime I think I have it beat.. I lose. Thats the irony. There is no beating it, learn to live with it and respect it. There aren't really tricks. I find for me personally
write out what it is causing it
why it is your fear it completely
then write the positives of the relationship and what makes your relationship strong and unique.
I find that usually gets rid of any problems, sometimes it helps to talk directly to the person involved, but learning how to beat your own demons with a big stick is more helpful, I can qwell most fears that way. And, I honestly, rarely feel jealousy but it springs up from time to time.