He only sees me alone, never wants friends around

When someone consistently chooses to see you alone and actively declines opportunities to include you, that's intentional. It doesn't matter if he frames it as introversion or says he prefers quiet time together. The pattern is that he's controlling where and how you spend time.

This serves him in specific ways. You don't get to observe how he behaves around his friends. You don't have outside people who know you're together. You can't compare what he tells you to what his friends know about him. Isolation creates dependency because the relationship exists only in the bubble he's set up. If he wanted you around his friends but just preferred one-on-one dates sometimes, that would be different. This is not that.

Your message needs to state what you want without asking permission. Not "Would you want to introduce me to your friends sometime?" That invites him to say no. Instead, you're signaling that group hangouts and meeting his people is normal for you and non-negotiable.

Second, your reply should make it low-friction for him to say yes. Propose something specific he can attend without it feeling like a big gesture or commitment. A casual friend gathering, a group dinner, a game night. Something real that's already happening, not a setup where he's performing for you.

Third, watch what he does after. If he agrees and follows through, you learned something. If he agrees and then finds reasons to cancel, or if he says no directly, you have your answer about whether he's willing to include you. That answer matters more than the reason he gives.

Don't wait three months hoping he'll change his mind. The window to address this is now, before you've built a whole story around his behavior or invested heavily in convincing yourself it doesn't matter.

Send your reply while the context is fresh. Right after he suggests another solo hangout or avoids a group invite works best. Don't overthink it or write something long. Short and clear is harder to argue with.

If he doesn't follow through or makes excuses the first time, give him one more attempt with a different event. After that, stop proposing couple activities altogether and start making plans with your own friends instead. If he's not willing to integrate you, you're not in a real relationship. You're in a hidden arrangement. The sooner you stop waiting for him to change it, the sooner you can move.