Othello Syndrome - Morbid Jealousy

Hello Everyone,

I hope I can find someone who has passed what I am passing and found a solution, because is something I lost control of it.
I am 27 years old guy, coming from a well known family,with a good job, kind and caring but with a bad past. Always confident, unless it has to do with love, I lose it, i feel like I am nothing infront of other people.
Unfortunatly I am victim of something called Othello Syndrome)Morbid Jealousy=. This has ruined all of my relation ships and is ruining the one I currently have, which means more than anything to me.
My lady wants to leave me and she did already twice, yet we end up back together. Today I think she really had enough. As much I try to keep it inside or not think of it , I constantly think she is cheating at me, wants someone else, lying and hiding things from me. I do not beilve what she says when she tries to explain me.
Some examples
1. If she does not pick up the phone, she is with someone else.
2. If her phone is busy, she is talking to another man.
3. If she wants to close the phone, she is hiding something.
4. If she is looking outside the window she is looking for guys
5. If she looks at a guy she likes him
6. If a guy randomly text her, I think she actually is talking to him
7. If she sleeps more than usual she spent the night talking to someone else
It made her fear me when she opens her mouth,she is scared to use the wrong wording. Somehow I feel, is a 6th sense saying she is not the one for me and something will happen, she is lying, she is hiding. In other cases, like this one, i feel so disgusted of myself though her suffering, her spontaneous insane reactions of anger.
I do not believe i am going to be like this forever, because, as she is suffering , this thoughts are rotting me in the inside.
Please if anyone knows an operation, solution, medical treatment,someone anything that cures me and live a healthy relationship with the person i love.
Desperate to ask forums and the world.I have been once to a psychiatric and CBT, both are not helping
Looking forward with hope
DreadfulKnight