how to politely ghost someone??

I really need help. There’s this guy I met on TikTok (I know, dangerous) at first he replied to one of my videos then he started messaging me so I just politely messaged back and then he starts saying I love you? Now he won’t stop sending me videos saying I love you sm, thinking ab you, etc. He’s soooo lovebombing me and I’m tired of it but idk how to ghost him w out being rude.. I’m thinking of blocking him but ik that can hurt a lot 😭😭