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No. Because the reason you are texting him is to see if he still thinks about you, which means even though you were the one to break up with him, you're not exactly over him. If you were over him, you wouldn't care if he thinks of you or not.
On that note, get over it. You had valid reasons to break up with him. He liked you enough to date you, why do you need validation on that? And why do you need validation from an ex? He's an ex, he doesn't matter. Move on.