Nerves I guess?

Okay so boom.... my boyfriend and I have done it a couple of times now (in the car). 🤭😂 Yet I really want to “show” him more than what I’m giving him but I think I’m holding back. I’ve squirted with my previous relationship while having sex but I don’t know how my current boyfriend will react. The sex is WAAAAAY 😩 better but I don’t want him to freak or something. Any advice on this?