stop being so jealous

I’m very jealous when it comes to other women. I was cheated on by my previous boyfriend and I have now found myself a wonderful man, we’re even getting married next summer.
But I’m very very jealous. I’m scared that I’ll get cheated on again even though I know he’s not like that, I’m scared someone will try to steal him away from me, because he is just so perfect to me.
I get really angry – even furious – when one of his exes invites him to a party, when he mentions their name,... even with girls he just kissed and never had a relationship with I get incredibly jealous. When there are girls around him I always feel like they are prettier and funnier and whatever… and I get jealous and bad tempered again…
This is a very unpleasant situation for him and for me, but I just can’t seem to help it. I’m trying Bach Blossoms but I’m not sure yet if they help. ..