I'm entering into a new relationship, and so far, so good. I mean, when I check the facts, that is: he's told his old flame he's seeing someone new, he's not shy about me, he's taking me out in public, he's very patient, validating, caring, very understanding of all my issues, very affectionate, texts often, expresses that he's excited about seeing me, and tells me a lot of wonderful things. He has a good relationship rap sheet, too. Overall, just a great person who clearly cares about me very much and is interested in following this path.

But of course, now, in my mind, I just keep replaying all the reasons he'll leave me. What it'll look like as it approaches. What he'll say. What reasons he'll give. 

My friend told me it would be a good idea to write myself down instructions for what I'll do if he does eventually decide this isn't what he wants (for reason other than my Crazies: actual reasons people end relationships, like incompatibility, or just not feeling it, or whatever.) I'm wondering if I should make like a Crisis Plan of sorts. I'm thinking that maybe if I have a plan of action ahead of time, it'll help me put it out of my mind. I'll have a safety plan for myself so I can have "instructions" on what to do for myself when I'm in too intense an emotional place to make behavioral decisions.

Any tips for how to get that shit out of my head and just enjoy this person, day to day? (Also, any tips for what to write down on a Crisis Plan?) 

This is the first time I'm entering a relationship with this level of self-awareness. But self-awareness doesn't mean my feelings are different...it just means that I'm aware, and I know what's causing them. I know it's not him, obviously.