"Only child ~ Lonely child"
Nothing could be further from the truth.

Through circumstances beyond my control, I only had one child.
Now 23, my daughter is confident, outgoing, self assured & very happy. As a result of having time to lavish on her, she had as near a "perfect childhood" as anyone could wish for. Her words not mine.

By contrast, I was one of four girls. It wasn't until I became a Mother myself, that I realised how overlooked as a child I was. To me, being left to stumble through life without the real necessary emotional support & guidance a growing child needs, was all just an accepted part of my life. Once a Mother myself, I vowed to learn from history and not repeat it.
I was neither abused or mistreated ~ my Mother was just always too busy looking after someone else.

My sister had her last child at 42, (despite having already had 2 autistic children) she couldn't be happier. He's adorable and was sent for a reason. When she's down, he makes her smile.

Every child brings their love with them, as you will already know. To want more of that love is not a bad thing. What ever choice you make/reach will be the right one for you & your family.