It doesn't matter how good your life is, if you are abusing MDMA on a weekly level, you ARE going to have to deal with the brain damage that comes with it.
MDMA is neurotoxic just by the way it works. You cannot separate MDMA's effects from brain damage, it's the release of serotonin that directly causes this. You can do things to minimize this harm to an almost non-existent level..... but you're not doing that.
You have two choices, friend. Either keep using MDMA like you are and deal with the consequences and brain damage later... or man up, take some responsibility for your life and use MDMA in a responsible way.
MDMA abuse is one of the most damaging things you can do to your body, I can tell you this from personal experience dude. You're on a very dark road right now, and if you don't do something about it I'm confident I'll be seeing a thread from you soon wondering where all your anxiety, depression and depersonalization came from.
Just be safe. A few good nights out isn't worth destroying your serotonin system, take it from me dude.. I've been there, I only have your best interests at heart.