couldn’t get him off?

i gave my first blowjob last night and i couldn’t get him off. he explained to me that only 1 girl out of 4 or 5 that he’s hooked up with have been able to make him orgasm so that made me feel a bit better, but i’m still pretty embarrassed. i guess it’s cause blowjobs have always seemed like a foolproof way to get a guy off and i couldn’t even do it. is it a huge deal?