Is this a good plot for a novel/book? help pls!?

It is definitely a good start. It's a little dry and predictable at this point. Try adding something to spice it up and throw off the readers. (Elaine has a new suitor chosen by her parents, someone dies affecting the romantic availability of a character). How does the story get resolved because at this point, someone ends up heartbroken no matter what, or is that what you're aiming for?