So, a needle poke is different than an injection. While transfer with syringes happens, it is usually in the healthcare setting. But because air inactivates the virus, a needle poke is generally not a risk. The last documented case of this happening was in 1999 in the healthcare setting. The risk is negligible here. Talk to your supervisor for protocol (assume you work at an establishment). Typically there needs to be visible blood in the device for transmission. And remember, this isn't like sharing needles, this is a stick.
I would just get tested to be sure. But if he is undectable you should be fine. Don’t worry yourself about it though