Who do I get anxiety around him?

So I’ve recently started dating this guy, we’ve dated for about 4 months now and I love him a lot and I know he loves me, but recently I’ve been getting a bit of anxiety when I am around him. I don’t know why it happens but it comes in a wave and then I’m fine again. It’s really bothering me as I don’t get anxiety with any other people I’m around so why is it only around him?