No matter what other people say or do, your inner brilliance can never be diminished. You are always shining, constantly casting light onto others. You being here does make a difference in the world, as you brighten it with your mere presence. Never stop shining. Never stop being your amazing self.
Always try to empathize with others and make a genuine effort to understand their situation. You never know what another person may have going on in their life, what they might be dealing with. And you may not truly be able to understand until you get to know them better or experience their situation yourself. But, that's why rather than pass judgement on others, we should treat them with kindness and understanding instead. Show them tolerance and acceptance.
Throughout our lives, we go through many different friendships, some of them long lasting, and others not. Of course, this is perfectly normal, and it's inevitable that not every friendship will continue. But, it's all the more reason to hold onto the true, lasting friends we have and treasure them. Make sure they know you love and appreciate them. Be grateful to have these friends in your life and convey that gratitude to them every chance you get.
Remember that it's okay to take a break, especially if you're feeling burnt out or worn down. You don't always have to be creating, working, doing, or generally being productive. It's perfectly alright and understandable to take a break from your more productive activities and take time to rest/relax instead.
If we become too engrossed in the past, it can have a detrimental impact on our present and future lives. Reference the past for knowledge gained and lessons learned, but don't live in it. The simple truth is the past is in the past; we can't change what's already happened, no matter how we try. But, you still have a whole life ahead of you to focus on and build.