I feel bad that I didn't get an erection while grinding?

I'm an 18yo male and I went to the club last night(In Canada, I can also drink) and my friends bought some bottles, I only drank like 3-4 shots. So I danced with around 10 girls that night+, and grinding with most, althought I couldn't get hard despite doing a very sexual dance with VERY attractive ladies. I've never had this problem before, prior to the night I masturbated around 3 times, so that might be it. I also got this girls number outside the club and kissed her on the cheek, we also went and I bought her and myself a strawberry lemonade at Tim Horton's and we talked briefly throughout the night. I grinded on her a couple of times as she is a friend of a friend, I really like her and think she is extremely attractive. Is it really bad that I didn't get a hard on?