SO ignoring me after sex, LDR. HELP!!!

We had sex a couple days back and I've tried contacting him via text and all...and he never replies back.
Contacted him yesterday at 8am and he didn't reply until 1pm saying hi and then I contacted him back at 6pm and he didn't reply back.
 
Messaged him back this morning and he didn't reply....
Before he use to initiate the calls & texts. He's always busy and the only times I know he's not busy is when he contacts me via text/call first...
He's older then me, 7 years apart. I don't know what to do...
Is he playing with me or something?
Help me please!!

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