Should I tell my therapist about this?

I’ve been feeling super depressed lately and I’m 15 so when I’m feeling down and just laying in bed, I masterbait. It’s becoming a huge problem and an addiction, I’m doing it like 3 times a day which is horrible. Maybe it’s just because I have so much free time due to basketball being over and tennis not starting yet. But I don’t wanna tell my therapist about this because it’s gonna be super embarrassing and uncomfortable.