I like to think that when Iwaizumi lectures Oikawa a bit too aggressively (like when he headbutted him) he immediately feels so bad for going overboard that he writes Oikawa a little note every time and hides it in his bag or his notebook or something for him to read later. The note just says a small apology like “I’m sorry I headbutted you” or “I didn’t mean to yell at you like that” and then follows with actual nice compliments to make Oikawa feel better because that was Iwaizumi’s real intention in the first place. There aren’t any shittykawas or trashykawas; there are genuine compliments and support that say “I believe in you”, “I’m by your side because I know you can do it”, “you are too beautiful of a person to frown”, “be kind to yourself”, or “I will always love you and nothing will change that”.
It's okay to be scared of things changing. Your uncertainties are reasonable, but your friends are here to help you through if you let them.
It's impossible to make sure that the people you love never get hurt, no matter how hard you try. It's okay to be selfish sometimes, thinking of yourself is part of being healthy.
Being sad won't make your friends dislike you. People may look to you as a mood-maker but they'll pick you up just as quickly when you fall down. Letting them see you cry won't stop you from making them laugh later.
Stop comparing yourself to others. You will blossom and fly at your own pace, not at anyone else's. Rome wasn't built in a day and Picasso wasn't born knowing how to paint; keep working and you'll get there too.
The hardest part of falling is picking yourself back up. Don't be discouraged by your backslides and bad days, keep focused on the good things you're doing instead. It's hard to see the progress you've made, but it's there even when things seem dark again.
Take a break and take a breath. You don't need to have your whole future decided tomorrow; let your feet find a path on their own and when you look back you'll see that you've been walking on it all along. You are not the mistakes that you've made and you still have a future.
There will always be people in your life who tell you that you're not good enough; don't be one of them. It's okay to have doubts but remember to be kind to yourself too, your hard work will reap its own rewards.
Be sensitive to those around you; not everyone can share in your energy all of the time. Don't let the world make you grow up too quickly, it's okay to be a little silly and to laugh loudly, you'll always find people to join in.
Be forgiving of others. It's hard feeling like you've always got it figured out for them, but people need to grow and learn on their own too. Loosen your grip a little and they might just surprise you!