E is 3 months shy of turning 3 years old and she's having a really hard time socializing. I SAH with her and she only has a few friends which we see every few months. Every time she's around them, she clings to me, she won't play or talk...it makes me so sad because she's so fun, playful and talkative at home. She even shakes and gets visably nervous (looking down, not making eye contact, not smiling, etc).

We went to a play area yesterday with a few friends and she stayed by me the whole time. She wouldn't play. She wouldn't say hi to her friends. The place was loud and kind of crazy but still, I'm worried at this point because socializing is PAINFULLY scary to her. I tried not to push her - I want her to trust that I won't make her do something that's extremely intimidating to her.

Any advice? We go to the park, play groups, other areas where kids play and she clings to me there too. I'm not sure how to encourage socializing. She starts preschool in the fall and I know it won't go well if she's going to keep clinging to me.