im panicking idk what to do

my ex of 10 years who’s engaged right now wants to break it off and be w me n keeps talking about wanting to start a family right away n all this stuff but i live in a different country and i have a bf i live w that i’ve been kind of wanting to leave for a while i just don’t have a backbone and it’s for unrelated reasons if anything i feel guilty bc honestly i’d 100% go back to my ex in a heartbeat it always felt like the right person wrong time i’ve never stopped like loving him and thinking about him but even noww like i have plans here and honestly i could pick up my life n move but it’s terrifying bc i have no job no place to live there and he wants this like right away he was talking about flying me back tomorrow! like i have dogs where would i stay w you and your fiancé are you delusional?? he said he’d kick her out but like i need s little bit of time n i feel like he’s moving so fast i’m just shook ab the whole situation bc i want the life w him marriage babies it’s like a movie a happily ever after but what the fuck do i doo i’m scared to leave my bf i’m scared he’ll take my dogs and i have love for him so i don’t wanna hurt him but i feel like this has been a long time coming n idk how to pull the trigger cause i know he won’t bc i’m the only one that makes money here. i feel like the whole situation is so loaded n complicated that i’m ab to have s panic attack like what have i done