A responsible person takes charge of their own emotions. You are on the right track asking for help.
Ultimately, no one can make you do anything - unless they're pointing a gun at your head - no one can make you mad, no one can make you react a certain way. 99% of the time, we have a choice on how to react.
For some people their growing edge is impatience, for some it's a hot temper - for you it's jealousy. Bottom line, do not take your emotional reactions out on any one else. My teacher/mentor says that when a person is in upset, they are not fit for human contact. And being upset is optional - it is something we choose.
So practice choosing quiet trust, practice choosing serenity, practice choosing compassion. You will mess up sometimes and let your emotional reactivity get the better of you and you'll create more suffering for you and your loved one, but be easy on yourself - we all make mistakes. Just keep doing it. One day, like all practices, it will get easier and you'll no longer be reacting in jealousy. Think of what a huge ripple effect that will have in the world - there will be less suffering because you took responsiblity for your own upset.
I wish there was an easy spell or something i could tell you, but it is a life lesson in disguise as a jealousy "problem." What a blessing this is! If you learn this lesson now, you will be ahead of the game i promise: no one but us is responsible for our own emotions. To think otherwise is to play the helpless victim.
Especially for those of us who seek to influence the world with magic, we MUST be able to control our own mind and emotions. Best of luck!