I’ve been trying to get over my feelings and stop trying to think the worst possible scenarios and it’s been extremely hard because literally, my brain is so hardwired to thinking the worst. And he keeps telling me to communicate my thoughts to him but it’s the same thoughts that haunts me and the same thoughts we’ve talked about. He’s extremely tired of hearing this over and over again but this is still bothering me because the chances and the what if’s cloud my mind. He told me he is miserable and is so exhausted from fighting and arguing. I just feel like I have to let him go because he makes it sound like dating me is like walking on eggshells and that I don’t appreciate all the things he’s done for me. But I do. It’s just those fucking worst case scenario thoughts are so scary for me that I can’t stop thinking and hyper focusing on those instead of all the good he’s done for me. 
I feel like I need to let him go but i don’t want to lose the man I love. I’m so conflicted between what I want and what I need. Please help me with some advice