i’m running away

for context my father whom i lived with for a long time is now in jail and will be in there for a long time. as emergency placement i’ve been placed with my uncle and his partner. i’ve been butting heads with them for reasons i won’t share but to sum it up they

1. want to send me back to a school i was heavily bullied at
2. don’t believe my attempts (that ended me up in the hospital) were “real”
3. they constantly talk low of my father in front of me (those are just some) i’m thinking about packing my room and running away to a friends place as her mum said she’s more then happy to have me. how should i go about this because if i spend one more week there i will loose my mind.