*BIG HUG*
Misaki-chan, of course, I know it is hard to be "brushed off." In my story, I get beaten up because I was being a teacher's pet and being like the top student of the school. (In Korea, they have lists of students with their grades. But I don't think they have that in elementary school now. My elementary school had that though .) Anyways, people do brush off people who are "unique" and "weird." They have some problems and people like that aren't much of a "good friend". Real good friends don't really brush off someone whether they are ugly, stupid, druggie, etc... maybe the douches or *Female dogs* would be rejected.
For your middle school, it's basically the same idea for "brushing off". But well, those "friends" who weren't nice to you anymore weren't your friends in the first place, like that friend you mentioned (To be honest, I would punch that person in the face with my spike gloves.) . Maybe they were "using" you to be friends with someone else, or to do homework, classwork, etc... Thing called friendship can't be broken. I can prove that by my friend, who fought with me one time and haven't talked for about 2 months. When I got hurt(broken leg via car crash) and hospitalized, he came to visit and became friends again. Normally, the people who weren't "friends" wouldn't care.
"Love relationship" well... don't trust on that stuff. Really, don't. According to the anime, the time when you are relationship is when that person knows(or suspects) that you like that person, then you confess or whatever . It never works that way...well.. maybe... .
You really want to keep love stuff personal, don't share it unless you really trust that person 100%.
Dare thing... well I hate that thing first of all. I usually ignore it. When someone ask me "I dare you to go out with me," I would say "Are you sure of that? Good luck trying to marry me. LOL, now, GTFO I'm going to do my work." Yea, what I do is play around with it, then troll the crap out of them. But that's when I get annoyed. I ignore it the first time. When they ask "are you deaf?" I say this: "Huh? Oh I'm sorry, but I'm not deaf. If I was deaf, I wouldn't even talk." if they say "Why didn't you answer me?" I say "Because I have the right not to talk, according to the First Amendment, Freedom of speech, press, religion, assembly, and petition. So I can believe that I don't have to talk, or play that little childish dare games." If they get reaction like WTF, I say "Ok, now you know, you can go now, shoo, I don't talk to uneducated child like you."
I can be really cold, as you can see above. I don't recommend using that, but you get the idea of how to brush off things like that. Oh, and like IdentityUnknown said, you can make a wikipage about yourself by clicking your account(top right corner next to an icon) when you are in the wiki page.
Don't be down by that and that "friend" of yours. Ignore it. You would be surprised how I ignore people. People don't bother me a lot because they know they will be humiliated right in their face. Things will change in high school so don't mind much in Middle school. Just focus on your Real Friends and schoolworks.