First boyfriend

It’s currently 12am and I’m overthinking. My current boyfriend is my first boyfriend ever. We’ve been together almost a month now and I’ve just realized I am so scared. He’s 19 and I’m 18, and I really think he’s going to be my first love because I’ve become so attached. I am so afraid of feeling this way. I’ve never felt this way about a guy before and it’s really scaring me to the point where I don’t know if I wanna keep going even though I like him so much I’m just so scared of how I will feel one day if I’m broken up with.