Well, basically as the title says, im new here and have recently started to lose weight, but i find that i am becoming emotional and stroppy for no reason over irrational things. Its really changing my personality and i hate it.. but i need to get rid of this weight.

Does anybody know anything to boost my mood/energy and keep me happy?

Hey Haunted!

First off, you may want to take another look at your goal weight...115 would actually be medically underweight for your height. So it may not be a realistic place to aim for you.

Second, what is your diet like? We may be able to suggest some tweaks and changes that'll fuel you better all day long, which should help keep you on a more even keel.

Give us some more information and we'll see what we can suggest!

you must be low on some kind of nutrient .. my guess is probably iron .. i would look carefully at what your eating and try and figure out what is missing maybe vitamin b . also that affects mood . As madalinn said you are aiming far to low for your hieght .. the calculator for ideal body weight says

at 5'7

if your small frame you should aim for 126-130 pounds

if your medium frame you should aim for 135-139 pounds

if your large frame you should aim for 144-148 pounds

Your ideal body weight is where you are healthiest
This isn't meant to sound controversial or trite, but rather - most Ideal Body Weight calculators are based on simple measurements of height. This is NOT a good way to estimate your ideal weight. This kind of measurement does not take into account bone density, muscle mass, or fat proportion. In addition to this, due to modern body image obsession, and psychological disorders (EDs), many people are unable to determine an accurate body weight. The calculator can help.
You should be aiming for a body fat percentage goal.
An ideal body fat percentage for men would be 10-14%, or 16-20% for women. If you know your current body fat percentage you would be able to calculate your ideal weight. But not many of us know this!