He keeps kissing me and but won’t get fully hard?

this new guy I’m dating seemed really into me our first date chemistry was there we was definitely vibing & in result of that we kissed then we just kept kissing and he said he can’t keep his hands off me. I felt his dick pressed on me & it was rock hard. However the second date the chemistry didn’t seem to be fully there and although he kept kissing & touching me his dick was semi hard. What does this mean? Is he still interested or? Help need answers?
He keeps kissing me and but won’t get fully hard?
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