Why did he leave me?

my boyfriend of 2 years had broken up with me last year but he had still come back to me and we were together.. we live in the same city and he has told me he loves me.. however he moved to a different state last month and we met for the last time and we had sex.. after he left, i told him how much i love him and i would wait for him.. he said he doesn't know about the future whether we will be together or not and he said he loves me but at least we had a great time (sex) for the last time... he said long distance relationship is hard no matter how much people try for it... he hasn't talked to me or texted me since 1 week.. i feel used! why would u hurt someone you love...
Why did he leave me?
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