The world is full of negativity. There is constantly something or someone that wants to put you down. There will always be that voice in your head that says that you can't. But know what I've done when the world has tried to put me down? I saw screw 'em. I'm gonna be happy.
If someone wants to say that you aren't pretty, who cares? You may not fall into their category of beauty, but you do fall into Christ's category of stunning. You are beautifully made in Christ's image. So who cares what others think? Just be happy.
If something doesn't go your way, who cares? It can be a bummer not to get a job where you really wanted it, but do you know why you didn't get it? God doesn't want you there. "For I know the plans I have for you, declares The Lord. Plans to prosper you and not to harm you, plans to give you hope and a future." (Jeremiah 29:11) Things will happen in your life when Christ wants them to happen. You have to remember that you are on His time, not your own.
Happiness is a choice. It is not forced upon you, but you know what is? Sadness, bigotry, hatred, sorrow. But in times when you are being forced into these emotions, you have to remember to be happy. The world is running short of happiness. Everyone is getting too focused on the negative and no one is looking at the positive. Life is full of beautiful moments. Life is full of just plain beauty. The Lord has a beautiful will for you, you need only be still. Do not ever forget that you are more than worthy. You are more than beautiful. You are more than blessed. For The Father of Fathers, and The King of Kings loves you and is carrying you. And that alone makes me the happiest person I know.