Am I too obsessed? How to be a good girlfriend?

I can't stop thinking about my boyfriend. I think of him every second of the day even when I'm doing stuff. I just can't get him out of my head. I text him a lot too and sometimes he responds and sometimes he doesn't and when he doesn't I get super peeved even though I know he's probably just busy doing stuff. He's my first real boyfriend and I don't want to mess anything up. So is it normal for me to be thinking of him all the time? And how do I be a good girlfriend?
Am I too obsessed? How to be a good girlfriend?
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