He talks to me in person but ignores my texts?

Hi there. I had a question regarding a guy I like. Im new to this school and I developed a huge crush on this guy, but heard a lot of girls like him as well. But anyways, I contacted him through instagram and asked to be friends because i was too nervous to ask him in person, he responded 2 minutes later agreeing to be friends, we had a little talk and it ended there. Ever since that day, he's been ignoring my messages so I just stopped messaging him. Its been 23 days, and a few days before he swore he'd message me back but never did. It kinda upsetted me, and still upsets me. He talks to me at school thoigh sometimes which confuses me. He seems to get a little nervous as well around me, for instance he will mess with his hair. I went to his basketball game, he kept staring at me as well. Im sorry if this is confusing y'all, things I try to explain usually doesn't make sense. Note: He also talks to other girls, and messages them, so im just really confused and tired of feeling this way. Any help?
He talks to me in person but ignores my texts?
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