Ignore me for a day. I would probably assume that you were busy and it will make ne miss you more (but it will also play with my patience because I would miss you so bad). If you bombard me with messages 24h/24 iit would piss me off and make me feel suffocated 😡
If you have to be extreme be extremely annoying. That way they know you're being extreme. Ignoring someone for a day is just lame and childish. You don't even know if you're being ignored half the time.