My life is a mess help??!!?

Hey guys I'm 12 and will be 13 in like 2 weeks and I used to live in Australia until one day we decided to move to Ireland but my dad didn't really want to but he agreed the second aftter he agreed he burst into tears and I felt really bad but my mum said he was ok so about 2 months later I went to Ireland by myself and I got really homesick until my mum came but my dad had to stay in Sydney to sell the house and I have started to miss Australia now when I call my dad he always sounds very sad and he suffers from depression he said he was a failure of a father but he's not and he was crying and he has just been sad allll the time and I wish I didn't come to Ireland now also myd dad thinks my mum didn't love him and my mum seems to be telling me some lies recentlie and she said she did and my dad dosnt want to come to Ireland anymore so I might never see him again and I never no who tells thetruth and who I can trust i am sadd and crying all the time And life just seems pointless if every1 lies and is sad please help me I just wish I wasn't born just pls hel pme