I know my 'method' is not healthy. And it doesn't work on people who there is the instant borderline honeymoon connection, sadly.

I decide up front that the person is nothing like me and doesn't like me or won't like me and so I have nothing to expect from the relationship except attacks in one form or another. I try really hard not to be 'tricked' into believing they are sincere, keeping my guard up while at the same time I 'roleplay'/behave that I believe precisely the opposite is going on (that they are being genuine and a good person). Its sort of like playing possum.

If I call someone out on something or get angry I have failed my 'roleplay'. I hate that.

If someone makes it past all that, they might just be able to be my friend for like 3-6 months before something awful happens.