You've got your mother in a whirl... (I don't really see how the title fits with the story, since I don't see any moms mentioned in here, but I mean, technically, it isn't wrong... :P)

Hi everyone! Today I realised that it's been almost 2 months since my first day at school and I haven't done anything useful. I'm useless. I'm lazy. I'm going to be homeless and to have no education. Okay, I'm fine.
I want to tell you another story! How many stories do I have? A million, I guess.
It was a long time ago. I was about 10 years old. I was at my grandmother's house sitting in a the kitchen and drinking tea when a neighbor came into the house by. (What you said wasn't wrong, I was just desperate to actually correct something, so I made it more colloquial-sounding. xD) I don't remember what he wanted. I remember that he talked to my grandma ("Grandmom" is not something I ever hear, yet "granddad" is... strange. xD And according to wiki, "grandmom" is a word only used in the US. I live in the US. I never hear it. Wiki's full of crap. :P) then he saw me and came up to me. He shook my hand. I don't know about other countries, but in Russia only men shake hands as a greeting sign. So that man shook my hand. I didn't understand why but I decided to ignore it. 'Maybe he just likes shaking hands, maybe it calms him down,' - I thought.
- Do you think they are beautiful? - he asked looking at me.
- What?
- Your earrings. Do you think they are beautiful?
- Um... Yes?
- They're awful! You're a boy! Do you realise that what people could think about you?
My grandma interrupted him and told him that I was a girl.
Let's take a moment and appreciate/take in (A suggestion, not a total correction, because "appreciate" is usually used in a positive context.) how offensive it was. Thanks.
Even if I was a boy, it's none of his bussiness. He had no right to tell me something like this. What's wrong with wearing earrings when you're a boy?
Sometimes it makes me sad that a lot of people are full of stereotypes. I often hear 'You shouldn't do it because you're a girl!' or 'No one will ever marry you because you doesn't look right'. Okay, no husband, I got it.
Life would be so much better if people stop using 'you have to' whenever they want to.
It's my life, and the only thing I have to do is do whatever I want to do to make myself happy. I may look like a complete idiot, I may do stupid things. Unless I don't hurt you it's none of your business. Sometimes I forget about it. Sometimes I think: 'What do are people saying about me? How do I look like? Don't they think I'm an idiot?'
Maybe one day I'll finally stop thinking about it.

It's been so long since I corrected something by you! I missed your ridiculous stories and I'm super glad you're back. :D This one, well... I can relate to. >.< Since this is the embarrassing story hour, I guess I'll share mine really quick: I was about 16. I had an irrational fear of barbers and hair stylists, so my hair was long and I usually wore a hat out of embarrassment whenever I went outside. One day I got a letter in the mail - apparently, one of my neighbors had entered me into a junior beauty pageant and I was supposed to fill out the application so I could be in it. U.U And since my name is Jamie, a unisex name, I guess no one at the pageant realized it was a prank. At least, I hope it was a prank. >.<

I never found out who did it, but if I had, I would have thanked them for thinking I'm pretty enough to compete in a beauty contest. :P I suppose that's still nothing like you experienced though. Stupid neighbors. u.u

And a note on your English: Fan-freakin'-tastic! :D I don't even have any advice or comments to make on it except it's great and to keep practicing it with, *ahem*, English speakers, in order to make it even better. ;) Excellent writing, thank you for sharing!