low self esteem in a kindergartener? please help!
i have an almost 6yo little boy in kindergarten. i'm a stay home mom, and he had only about 2-3 mos of preschool. he's always been a sensitive kid, extremely bright, artistic, courteous and caring toward others. now he's in (a very small, nice) public school with a bunch of rambunctious kids and doesn't seem to be handling it very well. just had his 2nd parent teacher conference this afternoon and apparently he's been crying and basically shutting down in class. when i pick him up after school he's almost always happy and smiling, telling me he had an a+ day. at home he's perfect, we seldom have cause for complaint. i've never seen him have problems with other kids, unless they get rough, which he doesn't like.
i just don't know what to do. he seems to be having self-esteem issues, but he's just a little kid! his home is based in a very strong marriage, and is more or less picture perfect, really. dog, cat, fish, mom, dad, big backyard, bike, soccer, gymnastics, plenty of praise, tons of books, art supplies, you name it. why is my baby unhappy?? this parent teacher conference is a repeat of the first, 3 months ago. "academics are great, he seems to have problems with his self image." i am at my wits end. i feel like a failure as a mother. what have i been doing staying home all these years, just ruining my child? if anyone can offer any advice i would surely appreciate it.