hey! thanks for the feedback, that's very valuable advice

at the risk of sounding whiny... i gotta say this:
i have quite an active libido and love sex. it has been a really, reeeeally long time since ive had it this good (tbh it's the best). we've already arranged to meet tomorrow and i don't wanna back off! i know it's probably for the best, as you say, to break it off for some time and 'reflect' but.. gah! libido libido libido!
again, as you say, eliminating ideas of my ex is pretty impossible, but at the same time im trying my best (be it 'placebo' or not) to come to terms with the fact that there were some irreconcilable differences.
i have also come to terms with the fact that i will most likely never come as close to someone as i was with him, so i have lowered my relationship standards.
i by no means want to dive into a relationship in general (definitely not because of sex), but i want to maintain this fwb thing.. it's so guuuud! also.. even though he is definitely not even slightly emotionally invested in me, due to his past relationships (and his knowledge of my past) i dont think he would really be interested in me if i were even casually seeing other guys, even though this is fwb. not only that, but i dont have the desire to see other guys.
are there any exercises or boundaries i can set to myself (like some sort of instant short term neural pathway rewiring i can impose on myself!) for the time being so i can maintain this sexual relationship without getting fooled by my stupid emotions?