My First Kiss

A few months ago, I met this girl and the first time we met we were just cuddling because IMO I think its stupid to have sex or make out with someone the night you meet them. At that time, Im only 18 and I havent kissed a girl before. A few months later I saw her again and we hooked up (no sex) and everything went well but I was very nervous. I did not get erect when making out with her do you think it was because I was nervous? For some reason when we were cuddling I was erect 95% of the time but when we made out I did not get not get erect.