Advice?

My boyfriend and I have been going through some really awful stuff with our families lately. My parents hate him and don’t ever want to talk to me and forbid me from seeing the 6 younger siblings that I helped raise and his family thinks he’s going crazy because his younger sister ratted him out for an argument they had the other day that she feels has ruined her chances to get married to her boyfriend for a long time. He wants to go away and have space from the families and we’re kind of toying with the idea of running away and eloping. I don’t know what to do and I need some advice.