That's really cool. If I were you I'd start meditating with it. Yeah, you're right that you can call it meditation. Meditation isn't how most people think it is. It's not quieting your mind nor is it just paying attention to the sensations of the breath. Meditation is simply repeating an intention and accepting the outcome.

You don't need to sit down nor close your eyes to meditate. You can do it anywhere, any time. Just repeat the intention to feel the ASMR and let it grow. All the while remain aware that you're feeling the ASMR and be aware that you are aware.

The feelings should grow in even more intensity and if you can manage to keep your mind on the ASMR then over time an unusual pleasure can arise. This pleasure is unique to meditation and is caused by unification of mind. I'm not a buddhist but it's called piti and sukha in buddhism in case you wanna look them up. Profound peace and relaxation can become your default state of being if you start meditating.