I told him I missed him and he just ignored me?

Me an my ex dated for 5 months, every thing was great until I changed schools and It became impossible to see him even on weekend (which is really dumb, he lives like 10 min away, but he is really busy on weekend with his family ). So we broke up and decided to stay friends (we only talked once after that, but it wasn't awkward or anything like that)

2 weeks after I couldn't take it and I sent him text telling him I miss him and I can't stop thinking about him...

He didn't answer.. he just ignored me. I really feel like such an idiot

Did I ruin my chance of still being his friend?
I told him I missed him and he just ignored me?
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