My daughter is 6 months old and is very independent. She will play on her playmat, or sit in her highchair watching me do stuff or playing with her toys almost indefinitely as long as she is not hungry. She is responsive- often looks over and smiles at me, or will watch what I'm doing, but doesn't seem to 'need' me in the way that other babies seem to need their mothers. She is very happy for me to go in and out of the room for example and doesn't cry when I leave. She is also pretty quiet- she has gone from making all kinds of squawks and sounds at 3 months to very few sounds at 6 months.
She is interactive- will smile and giggle if you play with her, gives kisses (face grabbing, open mouthed slobbers), and enjoys company but doesn't seem to need interaction if you leave her alone. Should I be worried about this? Is this some kind of attachment disorder/ ASD etc etc? I know I should be grateful that she is so easy and happy but can't help but worry. Thanks in advance.