Reen, what is your hair type? (straight or curly? fine? etc.)
I agree with the others. Go as long as you can in between washes. Try to rinse with a softer water. Also, comb instead of brush, especially if your hair is curly. Use a wide tooth comb for detangling, it will be less damaging than brushing.
If you can find/afford it, use a little coconut- or jojoba oil on the length of your hair a few times a week.
And about the cutting, please use the 2 week rule (as is done on the long hair forum
) Think about it for 2 weeks if cutting is really what you want. As long as you're not sure, don't do it.
Remember, if the water is the problem, shorter hair won't make any difference.
Good luck! (and if you're interested:
thelonghaircommunity.com)