I am sorry that you are feeling pressured into dedicating your life to this organization. If you have expressed your doubts I don't understand why the pressure would still be there?
Maybe a better stalling tatic would be to say that you are open to the idea but just need a little more time then sept. to fully know what you are going to do.
My two cents for the day......the deeper involved you get, the harder it is to get out.
Take care, Damselfly