Sometimes things go wrong and it’s not your fault 

Stop rethinking what you said, and did and how it would be different if things hadn’t happened that way.   Occasionally, things go wrong and it’s not always necessarily entirely your fault- there are many factors and it’s impossible to guess how things will entirely turn out. 

Talk to people about how you feel and your struggles 

There was a point where I told absolutely no one how I felt. And I know it’s daunting because it can be scary how people may interpret your feelings or whether they’ll get the wrong end of the stick-that was one of the main reasons why I didn't really tell anyone. But more likely than not they’ll be someone who you can talk to- don't shut out the people who love and care about you the most.  Bottling up emotions isn't healthy and it'll make you feel lonely- always remember that you aren't the only one struggling or who struggles. There will always be someone who is going through the same thing and there'll be people who have it a lot worse than you.

Know when you're not being treated as you should be 
There are people who will be unkind and nasty and who will not appreciate you. It's not you- it's them. There are inevitably some people which no matter what you do, will find a way to try and make you feel smaller. Don't blame yourself for it- try and be the best person you can be and focus on the people who do love you for who you are.

Learn not to care
This is easier said than done! There are always going to be rumours or ideas spreading around about what you did or didn't say and supposedly who you are or aren't. Always remember what people say about you is a reflection on who they are as a person, not you. It is impossible to please absolutely everyone so just try and be the best version of yourself.

To all those people trying to bring you down- don't let them win!
No one has power over you unless you give it to them. At the end of the day, your happiness is a priority and that is what matters. To people who are trying to upset you- don't give them the satisfaction of succeeding. It is normal to be upset about some things and we are all human, but thinking about not giving them the satisfaction of winning helps have a more positive outlook to people trying to bring you down.

If you don't like the situation you are in, leave.
You are in no obligation to stay in a place where you aren't happy. Know you have the independence and freedom to leave. It sometimes can take bravery and courage, but you'll set yourself free.

Don't ever be ashamed how you feel and respect and embrace every feeling. 
It is completely natural to feel upset sometimes. Cry it out and allow yourself to be upset- don't put pressure on yourself that you alway have to be and feel happy. That is not the way life works. Crying doesn't make you weak, it makes you human.