how does it feel to be an only child of the family?
I am an only child and it feels normal to me since I've never had siblings.
Don't feel lonely at times? especially when there is no one to share toys with?
Yes at times I feel a sense of loneliness and I feel a lack of connection or communication. 
Have you ever felt pressured to tell your parents about the need for a sibling?
I have never felt that way. I think my family is just one of many that decided to have less children.
Did you feel special as a result of your parent's decision?
I didn't feel special because it's like this in many families. In the 20th century average family sizes decreased overall quite a bit so it is pretty common.