He only texts me late at night: should I say something?

Late-night texting on its own isn't a red flag. Some people are night owls and work odd shifts. What matters is whether the only time he reaches out is after dark, whether daytime contact ever happens, and whether the late messages ever turn into anything with a plan attached. If every conversation stays in the bedroom-adjacent zone and never moves toward a Saturday afternoon or a dinner, the pattern is the message. Look at what he avoids: meeting in daylight, meeting in public, mentioning friends, asking what your week looks like. Those gaps are information.

Also notice how you feel after these exchanges. If you wake up with mixed feelings, or you find yourself rationalizing why it's fine, that's your gut registering that the arrangement isn't giving you what you want. You don't need a perfect read on his intentions to act on that.

A good message here does two jobs. It shows you've noticed the pattern, and it asks him something he has to answer in a way that reveals his intent. Keep it short and specific. Mention the thing you've observed, not his character. Then ask an open question about what he wants or what he's looking for. Avoid stacking multiple questions or sounding like a verdict. You want him to talk, and a long message gives him something to argue with instead of answer.

The second move is to say what you want, briefly. If you want daytime plans or a real date, say that without ultimatums. If you're fine keeping it casual but want it to be clear, say that too. The reply succeeds when he has to choose something concrete, not when he gives you a warm feeling.

Send it in daylight, ideally when you're not tired or tipsy and he's likely to be available. Give him a reasonable window, usually a day or two, since people reply to heavy messages at different speeds. If he responds with clarity and suggests a plan, great, follow up by setting one specific time. If he gets vague, jokes it off, or disappears for a week, you have your answer. Don't send a second paragraph chasing him. One follow-up short message is fine if you want to be sure, but after that let silence stand. The point of this conversation is to learn what he's offering, and a lack of response is still a response.