Does he like me if he introduces me to his friends

At three weeks you're still in the 'testing if we vibe' phase. Introductions happen for lots of reasons at this stage. He might introduce you to his crew because you were hanging out and they showed up. He might be excited about you right now. He might do this with most people he dates. He might have zero game plan. The fact that it happened doesn't tell you which one.

What matters is what happens next. Does he keep including you in group stuff? Does he text you the same way he did before? Does the relationship move forward in other ways? One introduction is data, not destiny. Watch the pattern, not the single moment.

A good reply accomplishes two things. First, it shows you were fine being there and that you fit. Not because you performed or tried too hard, but because you were actually okay in that moment. Second, it avoids turning the introduction into something bigger than it was. You're not gushing about his friends, not asking what it means, not making him explain his intentions.

The move is to respond naturally to the setting or the people, show you had a good time, and leave room for him to decide if he wants to do it again. Keep it light. Reference something that happened. Don't make it about the fact that he introduced you at all.

Send your reply the next day or two, when you can reference the event without it feeling like you've been thinking about it nonstop. Then give it time. If he invites you to group stuff again in the next week or two, that's a real signal. If this was the only time and he goes back to just one-on-one plans, that tells you something different.

Don't reach out to his friends separately or try to force a second gathering. Let him drive the next move. If weeks pass and he doesn't include you again, that's your answer about where you sit in his life. You're not demanding clarity or asking what happened. You're just reading what his actions show you.