How do I stop being “crazy”

Yes I know. No one likes a crazy woman. I know it’s not cute, I don’t think it is. I just don’t know how t stop at this point. I’v let my Past make me the person I am and for that it is indeed my fault. I’m very controlling. 🤦‍♀️ it’s crazy ugly. My fiancé is such a great man, but honestly I control him. I control who he talks to, who #’s are saved in his phone. I constantly go threw his phone. Yes I made him delete social media except Facebook but even then I see who he adds and who has messaged him. I don’t agree with porn, but honestly he isn’t a porn guy anyways. This man is so good to me even being so controlling. He’s home everyday on time. He never hides anything from me. I mean for fuck sakes this man brings me flowers home sometimes out of no where or just does something for me that shows how in love he is with me. He’s told me he doesn’t care that I’m this controlling because all in all I am his woman and he wants t devote his life to me. I’m his whole world and he’s proven it to me.. I just want to fix myself before I do destroy a great man. Idk what to do. But I’m going to start with him coming home tonight and telling him I want to a better woman for him.