I don't think you need to block or ghost him but you definitely need to be blunt, direct, and firm that you are not interested If he's a good friend then drive it home for him that you appreciate him as a friend but this love bombing behavior is not okay and will drive you away if he keeps it up It's not mean to establish a firm boundary when someone is behaving inappropriately, you can do it without being overly harsh or cruel
RUN RUN RUN AWAY BEFORE THEY GROOM YOU AND MANIPULATE YOU, RUN NOW WHILE YOU STILL HAVE YOUR AUTONOMY, THEY WILL LOVEBOMB YOU AT FIRST WHICH WILL MAKE YOU IGNORE THE OBVIOUS SIGNS LATER DOWN THE LINE, THEY WILL GASLIGHT YOU, MANIPULATE YOU, ABUSE YOU, AND MAKE YOU SEEM LIKE YOURE CRAZY ALL AT THE SAME TIME, ESCAPE NOW WHILE YOU REMAIN UNTETHERED!