Should you text him every day or give him space?

The length of time between messages tells you less than the shape of his replies. Look at whether he asks you anything back, whether he picks up details you mentioned, and whether he ever starts a conversation himself. If he's doing those things and just answers in a few hours, he's engaged and busy. If his texts are only ever a response to yours, with no questions and no new topics, the pattern is you doing most of the work.

Also notice what happens after you suggest something concrete. A specific plan, like a day and an activity, gets answered quickly by people who are interested. Vague replies to specific plans are the clearest signal you'll get that the texting is a placeholder.

A day or two of quiet is useful when the last conversation ended on something you can come back to later. If you were talking about a trip he's planning or a show you both want to see, let that be the next thing. Your next text then has a reason to exist beyond checking in, and his reply is easy to give.

Space turns into a problem when it stretches with no reason behind it. If you're going quiet because you're unsure how he feels, that uncertainty doesn't go away by waiting. It usually shows up as checking your phone and rereading old messages, and he can sense the change in your tone the next time you do write.

Texts sent late at night or very early tend to read as more intense than you meant, and his reply will often come the next day anyway. Send your message when you'd be happy to talk about it at lunch, not when you're lying awake wondering.

If you've sent one message with a plan or question and he hasn't answered in a reasonable window, a single follow-up is fine if it's light and gives him an easy way back in, without repeating the original ask. After that, two unanswered messages in a row is your answer. Stop texting and let him come to you. If he doesn't, you've learned what you needed to know without having to ask.