Your child is growing now and with that he is inculcating the sense of negotiation, which will help him get well versed with group participation. However, you need to overlook that your kiddo must not end up making unwelcoming negotiations just to be a part of the play.
What you need to know
Teach him healthy negotiation and also to respect the comfort of others. For example, during play they might give their toy to some other kid for playing, but that doesn’t mean they can ask to keep the other kid’s toy forever. Teach them boundaries of negotiation and importance of group participation with equality.