Why isn't my crush talking to me anymore. I'm really depressed?

Anonymous
lets call my crush John. we were assigned seat partners frm July to September. at first he didn't want to sit wif me cos I'm a quiet girl. he didn't hate me or anything, but he would rather sit with his friends. then as time passed we actually like each other now. I thought he had a crush on me cos he laughs and smiles really easily when talking to me even when I'm not being funny. he told his friend before during gym that he thinks I'm really pretty. his friend wanted to tell me more about what john said but he stopped him so I didn't get to hear everything. I never crushed on him back then cos I had a crush on another guy in our class...but now I think I actually like him.

we had to change seats and separate all the tables and chairs back in 29 September. so john and I are not seat partners anymore. but that's not when he stopped talking to me. we had to stay back after class for a test and we were still talking to each other like before, even though we weren't seat partners anymore. thn when night came, I went to his ask.fm and discovered that he's actually still in love with his ex (lets call her mandy). if you don't knw what ask.fm is, it is a site where you create an account there and anonymous people can ask you questions.

then john shared the part where he said mandy is his crush on twitter and tagged her, saying that he's still not over her. but mandy told him that she's already over him.

the next day at school, john completely stopped talking to me. it has been like this for a month. he stopped talking to mandy too evn tho they were still friends before the incident. however I've caught him staring at me twice. also during gym he lightly brushed his shoulder against mine even though it wasn't even crowded. his friends used to tease us from the day we became assigned seat partners about being a ''couple'' but they stopped doing that after the incident...but they also didn't tease him and mandy.

one day, they said that me and this other guy should date. then that guy said ''shes not my girlfriend. she's john's!'' then everyone turned silent. in the past when someone says something like this they'll make a mountain out of a molehill and go ''ooooooooooooooooo''. this guy is not very close to john and his friends so he probably didn't know the situation that's why he said that.

today one of the guys (whos also not close to john) said this to me out loud ''john said he wants to marry you!'' then john put his head on the table facing the other way. in the past he would laugh and blush. then one of john's friends changed the subject and talked about another guy ''Wayne said he wants to marry you!'' then everyone went ''oooooooooooo''.

idk why john is doing this to me? I really rly like him.
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also I only have 2 days left in school (this Wednesday, Thursday and Friday. tomorrow is a school holiday and after that from 20 October to 4 January 2014 will be holidays in my country). and we will probably end up in different classes next year. this really depresses me. I miss the old times. and I'll be really sad if we go to different classes :'(
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@legendary

btw I wrote this a week ago on microsoft but didn't know which site to post on. I forgot to mention some things. 3 days ago someone asked him ''do you like anyone else from your class besides mandy'' and john replied with a ''no''. so I don't think he likes me...cos he's not afraid to say that he likes mandy so he shudnt b afraid to say that he likes me if it was really true.
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@freefall7

hahahaha nope xD I still look the same as before.
Why isn't my crush talking to me anymore. I'm really depressed?
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