My almost 3yr old son, he is an only child started attending new daycare part time in June 2020. He would cry at drop off until few months ago. At his Previous daycare, his classmates erupt in pandemonium when he would enter the room, and teachers loved him. He is sweet, handsome and socializes easily with random kids on outings.I assumed it would be no different at his new daycare.His supposed favorite classmate and bestie invited all classmates to her bday party, I thought what fun. My son was excited at first but he turned into a mute and visibly uncomfortable at party. I was anticipating his peers excitement as he arrived to help calm his nerves. Nope,The silence was deafening, and we spent 30 minutes walking around like we crashed a high school reunion party. Awkward. He stood quietly near other Toddlers who wouldn’t even say hi or look at him even when mothers prompted. At one point, My son raised his arms outwards to a boy which I recognized ; but the boy began cry and retreated behind his father. Father apologized, claiming son was overwhelmed. I tried to explain to my son. We eventually left after my son began crying and tantrum ensued. In the car He kept saying “I am sad, not my friends” It broke my heart. Is there anything I can do to make it better?