Why does my crush no longer talk and look at me?

I have known my crush for a long time. Walking through the halls one day, my crush (not at the time) started smiling at me randomly in the hallway. And I mean uncontrollable, extremely happy to see me kind of smile. Me, being oblivious, didn't think anything of it. This became a usual thing. He even made up some sort of inside joke with his bff about me. Also, he plays sports, and he always gave me his pennants. Well, this go's on. This summer comes around. Now 8th grade, I am just head over heels for this kid. We continue to smile as usual and keep it up for awhile until all of a sudden he completely stops this. Like,, what? Me, being the one that I was did not understand this and made this completely worse by trying to get him to talk to me. DAILY. Was this wrong? Was this what drove him away? I don't know. I invited him to my bday party and he specifically said "Don't worry, I'll be there." He even got snappy when I went to talk to other people for a bit. by the way , his mom LOVES me. I've known her all through my awkward years. Anyways, it went back to being awkward after that. I constantly trying way too hard to get him to notice me. Then, 2 people told him i liked him with the reply that he knew this way before they told him. Skip to a later time, he wouldn't even look at me when I passed, and I just asked him to hang out with me and he said gladly, "Sure, anytime!" Which, by the way , was GREAT. But then back to ignoring... Skip to high school registration; I see him and he gives me the biggest smile EVER. like, MAKE UP YOUR MIND!! And we found out we had no classes. Things are fine and now its second semester and we have Spanish and we can't even look at each other. But sometimes I see him staring. I get so embarrassed and look away. We dont talk anymore but I really like him and miss him. I dont know what to do and just want us to become friends again.(if possible)
Why does my crush no longer talk and look at me?
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