Why doesn’t he text me?

This guy I’m talking to never texts me that much when he gets home … I was texting him and he said I’m running to the car I will text you 20 min
When he’s at work he texts me or he responds whenever he gets time but I was standing at just job I text him and he look at his phone and didn’t respond

Yet after I s u c k him off I get forehead kisses hugs etc but when he’s going home I barely hear from him again
Why doesn’t he text me?
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