Advice pls.

So my boyfriend and I have been together for 8 months. And this is our first time being in a relationship. But here's the most disapppointing and maybe embarassing, as well... He hasn't given me his phone number at all. Funny right? He would feel uncomfortable or unsure when I would ask him. I'd usually drop it because I didn't want to initiate any arguments. I mean, we'd communicate with "messenger" here and there. But it's not all the time. How should I handle this? I'm worried and confused. I don't want to over think it.