These are symptoms to worry about, from what youve written, it seems the only symptom your child is showing is not making eye contact...but if you notice anything else on the list then you may have reason to worry...
Doesn’t make eye contact (e.g. look at you when being fed).
Doesn't smile when smiled at.
Doesn't respond to his or her name or to the sound of a familiar voice.
Doesn’t follow objects visually.
Doesn't point or wave goodbye or use other gestures to communicate.
Doesn’t make noises to get your attention.
Doesn’t respond to cuddling.
Doesn’t imitate your movements and facial expressions.
Doesn’t reach out to be picked up.
Doesn’t play with other people or share interest and enjoyment.
By 6 months: No big smiles or other warm, joyful expressions.
By 9 months: No back-and-forth sharing of sounds, smiles, or other facial expressions.
By 12 months: Lack of response to name.
By 12 months: No babbling or “baby talk.”
By 12 months: No back-and-forth gestures, such as pointing, showing, reaching, or waving.
By 16 months: No spoken words.
By 24 months: No meaningful two-word phrases that don’t involve imitating or repeating.
I assume youve already looked up symptoms but you didnt really mention any of these symptoms other than the eye contact one...hope this helps
oh and this might help you feel better since many the symptoms you listed seem the opposite of this...
quote: "In some cases, the earliest symptoms of autism are even misinterpreted as signs of a “good baby,” since the infant may be very quiet and undemanding."