And I learnt...

That its ok to have nothing to talk at all, and to just be in each others company...
That its ok to want to be alone sometimes, its ok not to laugh every time. Not laughing every minute doesn't mean that I'm sad. And even if I am, its ok. Better get over with the frustration than keep it in... Go ahead and blast that person (who understands u well :))... Take out all the frustration... Or its ok to shead some tears and get done with it... (makes you feel lighter :)) Or (a happier solution) get lost in someone's words, who'll not know what's bothering you, but will make you forget it.

Record yourself, take a vedio of yourself when you're in a conversation. You'll get to know your flaws well... You'll know your expressions, your tone, your body language... Best critic for you is yourself. You wont be lying to yourself there. Observe and learn and change. Helps you grow into a better person.

That its ok not to know something at a moment, and its ok to be ignorant and ask "what is it?", "Why?", "How?". Its never late to learn anything.

That its never late to try again, or try something for the first time.
Its never late to learn how to laugh. Its never late for anything.

That its ok if you're what you're. Point is to make a happier world for yourself and be happy with yourself.