I'm sorry it's like that.
I know how tough it is. It's suffocating, exhausting, just all-around terrible to have everyone leaning on you.
>.< But you'll have to do something.
If you keep it all in you'll hurt 'em in the long run anyway.
And you can't be all there for them when you're feeling this overwhelmed yourself. Can you just let them know, ever-so-subtly, that you're not dealing well?
Many :hug:s to you.