PLEASE help me with this problem??!?!?

I feel like I'm a really bad person. I've been masturbating for as long as I can remember (It happened the first time on accident; I never knew exactly what it was or why I got that feeling when I did it) and I just recently understood that what I was doing was masturbating. I'm only 13 and It's become a habit that's hard to break. I only do it about 2 or 3 times a week (usually), and I really want to stop. Is there any way I could do that? ): Please give me a helpful answer....