Is it rare for guys not to cum when they’re young?

I don’t really know where to start. But basically my question stems from a night I had with this guy. I’m in high school and I’m a 17 I slept with this guy who I’ve been flirting with for a while but it’s strictly hooking up because that’s kinda his thing. I finally just did it with him which was inevitable. He didn’t wear a condom which was rlly risky bc he sleep around (got tested I’m fine) but we fucked for a long time like hours and we took pauses. But I’m really knew at sex, the first time I did it a guy I really like definitely took advantage of me and i don’t remember a thing so I don’t have much to compare it to but I thought it was weird he didn’t cum. I’m kinda embarrassed because my friends asked about it after and were all scared I was pregnant but I didn’t know how to tell them I didn’t think he even came because I was so embarrassed. Everyone says you’ll know if they cum but honestly I don’t! I’ve given head many times and I remember when I started doing that I was confused but now I can obviously tell when they cum. So did he just not finish but I’m I just bad bc we fucked forever and I gave him head and we did every position we knew! But I thought maybe bc he fucks so many girls and really gorgeous sexy girls I just didn’t do it for him bc I’m just a puppy when it comes to sex. Maybe I didn’t make enough nose? I’m just wondering is it rare for guys not to cum when they’re young? It’s kinda making me confused and doubt the skills I thought I had obtained over a couple people :(