I want to be Pretty

It’s important to remember that women are not supposed to be skinny. Women’s bodies are literally made for childbirth, therefore having curves does not make you fat at all, it makes you a natural female. Men love curvy bodies and an hourglass figure is beautiful. If anyone makes you feel like you should lose weight for cosmetic reasons, they’re the ones with the problem and you need to live with that. Only change yourself if you’re changing for YOU, never change for anybody else.
115 really isn’t that much and I highly doubt your BMI says you’re overweight. Also, your weight is just a number. The moment people start stressing about the number they see on the scale is the moment they need to quit the scales for a while. Instead, you should focus on how your clothes fit and look on you. Weight is just a number, and it changes by the hour, so it’s really unreliable.
Skipping meals and then snacking is far more damaging than eating several balanced meals. The healthiest way to eat is to have 5 smallish meals every day, as it’s better for your metabolism and for weight loss and maintenance in general, depending on calorie intake. If you really are set on losing weight, do it the healthy way. Calorie controlled diets might take time, but they’re far more reliable than any diet plan and a thousand and one times better than starving and then bingeing. Once you’ve reached your target weight (you should NOT be losing more than a few pounds, if that) you should stop trying to lose weight and instead try to maintain that healthy weight.
You clearly have a very negative self image, and you’re not alone in that. Many people suffer from low self confidence and do what you’re doing in trying to cover it up. It won’t work though, and as long as you’re depending on products to make you beautiful, you won’t feel it. I’m not saying that all make up is bad, I’m saying that using make up purely for the sake of making yourself beautiful is bad. Make up should be used to ENHANCE your natural beauty rather that cover it up. Until you feel comfortable in your own skin, make up will only make your beauty harder to find for yourself. If you cut down on the make up gradually, or got used to occasionally going without, you might gradually start finding good, natural features in your face that you like. Find just one feature, like your eyes, and concentrate on that, reminding yourself that make up only goes so far. And try to smile as much as possible, it’s cheesy, but it’s true that happy girls are pretty girls, and smiling genuinely for a while actually makes you happy. It might be fake at first, but it’s possible to turn that false smile into a genuine one.
The best thing to do is take it one day at a time. Appreciate the small things rather than stress about the big things. Even just thinking that the weather’s nice, or the sky’s pretty, or you really love your shoes, or you’re eating some great food, is likely to help you see the small pleasures available. Accept that it won’t always be easy, but that all you can do is enjoy the moments where you are happy. Eventually, it will become less of a mask and more of a reality.
Another massive reason you’re likely to be feeling this way is that you’re comparing yourself to your sister. Trust me, I’ve been there! I remember standing in a queue for a Band signing in January, and I was chatting to my friends about how I wanted to get a tiny bit thinner for Prom, when the random guy I’d sort of been chatting to and laughing with turned around and told me I was fine as I am and asked me why I didn’t think so. My response was that my younger sister is far taller and skinnier than me and that makes me feel crappy. He then gave the best advice ever- he told me never to compare myself to anyone else. I realised that that has been my problem for years, and it seems to be yours as well. If you keep comparing yourself to others, you’ll never be happy. I’m sure there are amazing things about you that your sister doesn’t have about her, and vice versa. Also, you might not hear your parents say nice things about you, but that doesn’t mean they’re not saying and thinking them. You are an individual and you are your own person, don’t let the opinions of others define you, because that’s where you start to go wrong. Everyone has flaws and weaknesses, just as everyone has perfections and strengths. It may show more on some than on others, but that doesn’t mean anyone’s completely perfect.
If your family can’t accept you how you are, that’s their problem and not yours. You didn’t say your age, either, so it’s difficult to tell what stage you’re at. I get the impression you’re in your teens and still going through puberty. You will grow and you will change, I promise that. That’s all the more reason to just eat healthily! If your sister is older than you, it may be that she’s past that stage, and if she’s younger she may not have reached the stage. It’s all a journey and every single person is different, every thing’s normal- I promise!
Anyway, you should never, ever, ever change yourself because someone mocks you, or tells you to. In life, being happy and being a good person is far more important than body image and how ‘fat’ you are. So what I’m saying is eat healthily, appreciate the good, don’t compare, and love yourself for all your flaws. The happier you are, the more your happiness will rub off on others. Being beautiful is not about looking good, it’s about being a great person, inside and out. For that to happen, you need to love yourself completely, and love the world and others. Be strong, and try to follow my advice. True beauty cannot be manufactured, remember that.