My family force me to go on holiday what should I do?

Asked: My family force me to go on holiday what should I do?

I'm 28 and live at home but trying everything to move out and get the money together but my job doesn't pay too good. I only live at home with my mum and she has helped me out alot but I'm getting grown up and whenever there is a family gathering my sisters all treat me like a dog. It gets worse though! since I was a kid my sister would pay for my mother to go on holiday and I would get to go aswell and she would pay but for the last 7 years the holidays have been brutal.

I've never wanted to go on holiday with these guys as they only cater to their needs. Also, my sister doesn't even ask me and just buys the ticket. What am I supposed to do? it happens every yearn and each time it's crap. It's just me and my brother in law in his 50s and 2 old women(50s and late 60s) and a spoilt brat of 13.

I get treated like crap(for suffering from depression/anxiety) during this and don't get any respect from anyone we meet. I'm treated like a burden when I've not asked to go and don't feel comfortable being paid for anymore. I've mentioned to my mum there is now way I'm doing that again, and she keeps quiet or says "oh you won't" in a fake way then summer comes and I've got no choice because a ticket has been bought. What do I do? it's kind of illegal isn't it? my mother wants to go but is to scared to leave me alone in the house so thats another thing. It would be ok if they spoke to me properly but they openly disrespect and taunt.