My boyfriend always takes a long time to reply to my messages, and sometimes he doesn't even reply. Should I give up?

It is always said on the Internet that whether a man loves you or not depends on the speed at which he replies to your message. This really makes sense. Let me tell you something. Nowadays, no young people leave their mobile phones every day. Even if the message is not disturbed, there is a record on the top of the mobile phone, so he doesn't return your message or for a long time. He really doesn't care about you. Take myself for example. It's not because I reply to anyone every second. Just because I was looking at my mobile phone, I casually returned a message. If you are really important, he will wipe his hands in the shower and return your message. Such a boy will still hold it if he wants it. When meeting such a man, he will say three words: come back! Step back. Step back.