How do I stop texting him even though I know he doesn't care?

So a month ago, I met this guy through hinge. I am not at all pretty, have never dated, so this guy was my first ever date. The first date went well, he did most of the talking cause I am a very introverted person and quite boring, I didn't have anything to talk about. At the end, when he was dropping me, we kissed (my first kiss). On the 2nd date, we even made-out. So we know each other since a month, it's nice meeting in person but on texts he replies very lately and gives excuses (like how could you not have a minute to text?).

I know I am nothing for him, and anyway he is way out of my league, so I shouldn't even keep expectations about us being anything. But his late replies, not picking my calls hurts me. I know I should refrain myself from texting him but I just can't - I always end up texting him.