Thought I could trust my cousins but they outed me.

Hello!a bit of context - 21 year old guy. I'm out to all my friends - starting telling them about a year and a half ago. I recently moved cities within Australia so I'm living on my own and all my family is in another city. my family is also quite religious.last month I was in my home city for Christmas. I'd been putting off coming out to my immediate family for a while, so i figured it was time. we were going on a family holiday for a week or two overseas to visit extended family, so I wanted to tell them before that.I told my cousins (20 years old and 19 - they're not sisters but cousins as well) in the hope that that would spur me to tell my parents - I told them not to tell anyone in case word gets out. the older one was super supportive and the younger one was like "because of my religion I can't accept this" etc etc. but she and her family came to my house and next day and in front of everyone she was like "you have to tell your parents, this is awkward" and I was like wtf.didn't get the chance to tell my parents unfortunately (things too hectic, they were moody, etc) so decided to tell them when I'm next home in March or so.fast forward a month and I haven't spoken to my cousins about it. I texted my Aunty (the mum of the younger cousin) yesterday to say happy birthday and she responded saying thanks and "hope I'm not prying but have you spoken to your parents about your situation" and I was furiouswtf it's not a situation it's who I ammy cousin must have told herI asked the older cousin (the supportive one) and she said yep her and the other cousin told all of their parents as well as their grandparents (my grandmas sister) - so all of our extended family in my home city know, except my parents and siblings. :/feeling super betrayed now and really hurt. haven't replied to my Aunty or my cousin, just really hurt and betrayed that they would tell everyone after I said not to tell, and worried that word will get out to my family. :( I've been feeling really low lately anyway and this is only adding to it.just made this to get this off my chest, it sucks.