Advice on what to do with this Guy?

Hi so I really like this guy and I’m going to
Be honest I have never met him so I don't know if this is weird or not but I’ve known him since November 2023, we have mainly texted/talked on Snapchat. There are times where he does not text back at all or slow to text back, which bothers me. Or we mainly as of lately have been chatting on Snapchat not texting, I feel like this is a big red flag but since it’s been a while talking to a guy I am highly attracted to and get along with I’m overlooking red flags. Should I just block him and call it a day?
Advice on what to do with this Guy?
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