Ask him for exclusivity without sounding demanding or insecure

If he's been seeing you regularly for months and hasn't brought up exclusivity either, pay attention to that. It could mean he's happy with things as they are and hasn't felt the need to change them. It could also mean he's avoiding the conversation because he knows what you want and he's not sure he wants the same thing. Neither of these is a flaw in you. The conversation will show you which one it is. If he's into you, he'll usually have an opinion about exclusivity. A total non-answer or constant deflection after you ask directly is information. It tells you he's either not ready or not interested in the kind of relationship you're building toward.

A good ask does two things without contradicting itself. First, it names what's actually happening between you both. You're not guessing or testing him. You're reflecting back what he's probably already feeling if things have been moving forward. Second, it makes space for him to say no without you falling apart. That sounds like asking what he wants, not telling him what you want and expecting agreement. The move is to be clear about your own feelings, then actually curious about his. If he knows you won't punish him for being honest, he's more likely to be honest.

This conversation belongs in person or on a call, not in a text thread. Text makes it too easy for him to overthink or misread your tone, and it gives him too much time to craft a non-answer. Choose a moment when you're both relaxed and not rushed. If he says he's not ready or doesn't want exclusivity, you have a decision to make about whether that works for you. Don't ask again a week later hoping for a different answer. One clear conversation is enough. If he needs time to think, give him a reasonable window, then move on with your own life. A real shift in his answer usually comes from him choosing it, not from you asking better.