You can talk to his brother to call him out on his bs and vent – I would actually enjoy that in your place – but you can't set and enforce boundaries for your fiancé, because you have no control over his behavior. So what if you tell bro not to bang on your door – he'll do it, anyway, and your fiancé will run and do his bidding, so any boundaries you set would be completely meaningless, your fiancé needs to be the one to set and enforce them.
Your fiancé needs counseling – his brother has raised and trained him to be his emotional support animal, and until he himself realizes how fucked up that dynamic is, his brother will always be his number one priority. I would break things off for the time being, with maybe the provision to revisit the decision if he gets therapy and goes to couple's counseling with you, and you see significant improvement. And you move away from bro – never again to live! anywhere close by.
Advice? What do you need advice about?
Get rest of you things and block him after that.
If you are really considering going back to him dunno what to tell you other than it's going to be the stupidest thing you've done.
You can talk to his brother to call him out on his bs and vent – I would actually enjoy that in your place – but you can't set and enforce boundaries for your fiancé, because you have no control over his behavior. So what if you tell bro not to bang on your door – he'll do it, anyway, and your fiancé will run and do his bidding, so any boundaries you set would be completely meaningless, your fiancé needs to be the one to set and enforce them.
Your fiancé needs counseling – his brother has raised and trained him to be his emotional support animal, and until he himself realizes how fucked up that dynamic is, his brother will always be his number one priority. I would break things off for the time being, with maybe the provision to revisit the decision if he gets therapy and goes to couple's counseling with you, and you see significant improvement. And you move away from bro – never again to live! anywhere close by.