I am 13 years old. I masturbate frequently and started when I was 12. I perform this act simply because it feels good.

My family does not know of my activities.

1- What would be my parents reaction if they found out? I fear this.
2- Should I talk to them directly about this and explain my intentions?
3- At this age could this activity be called innocent? I do not think what I am doing is wrong. I think that I should have the right to do this without contradiction . If it feels good why not do it?

Your family is more likely FULLY aware of your activities as it's perfectly normal.