Hmmm, I've had similar reactions to books I've read. (btw, I think it's a bit of a misnomer to say that a book is changing your life...a book can't do that, only you can.
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I'd read something, get really inspired by it, and start doing things that weren't like me at all only to discover why they weren't like me. So be careful in making any major life decisions based off the high of reading a good book. (btw, I phrase it like that because to some, reading a good book is like a drug in that it alters your state but wears off very quickly) Don't just go out and make major life altering changes based on what one book says (or how it makes you feel). Make sure that those types of things are things that are congruent with who you are.
As for your issue with your family? Consider the idea that you are telling people what you are GOING to do because you crave the attention and not necessarily because you want to do it. A good way to see if this is the case is to make a personal resolve with yourself (like I had to do) that you aren't going to tell people what you are going to do. You are only going to tell them what you have DONE.
That will get you a much better, more supportive reaction.