ILove2Write:
I really don't know what to do. I don't know if I should just change my whole wording to what the second person corrected or if I should just keep it at what I originally had.
Right now I think you're too close to the manuscript to make a decision one way or another. You obviously don't agree with all of what the critiquer has said (which is fair enough), but you seem to be getting yourself upset about what needs to be done and I don't think it's wise to edit a manuscript if you're not more detached.
So my advice in the first instance would be to put your manuscript and the critiquer's comments in a drawer for a few weeks and forget about them. Work on something else, read books, watch tv - whatever, just get to a point where you're not thinking about the manuscript every couple of seconds.
Once you're feeling calmer, take a deep breath and take both documents out of the drawer. Re-read your manuscript from start to finish, then take another look at what the critiquer's said. Consider the comments in line with what you were setting out to achieve with your story - if you think it fits in, then incorporate it; if you don't, then don't. Only you know what you're trying to do with your novel and only you can make the final decision on what comments to take.
Personally, unless your family members are themselves published writers, I don't think it's a good plan to let them take a look at what you're working on. A better solution may be to find a writers group (whether on line or 'real life) and run a few chapters (particularly chapters or scenes you're unsure of) past them. The SYW Forum here may be a good place to start.
As a separate suggestion, to the extent you're asking someone to critique your work, it might be a good idea to set down the parameters of what sort of comments you're looking for from the outset. That way the critiquer knows what you want and you know what to expect.
ILove2Write:
I'm also afraid that if I do one or the other it keeps my novel from getting read by agents when I send it in.
You can't worry about that. Seriously, if you get into that way of thinking, you'll drive yourself nuts. All you can do is write the best manuscript you possibly can and get it to a point where you don't think there's anything more you can do with it. If an agent loves it, then that's great. If they don't, then if you're lucky you'll get some feedback that will allow you to improve it before sending it off to more agents and if you're unlucky, then you just have to chalk it up to experience and get on with your next manuscript.
MM