You should take some time to reflect on various things pertaining to the relationship. Take one or two weeks and reflect on the relationship. When you are married, would you be comfortable with your husband going to nightclubs on some days especially on weekends? If you will not feel comfortable then you need to let him know you love him but you don't feel okay with him going to nightclubs. Right now, do you feel comfortable with him going to nightclubs even if you love him so much?
Stop thinking of whether you love him. You should think about whether you will be comfortable and whether you will tolerate it. In this instance, you aren't too young for a serious relationship but sensible enough to notice whether you are up to it - will tolerate the act.
If you are comfortable with the act, you should contact him a week or two and let him know you had been thinking about what he said, you acted irrationally and apologize; the reason you took some time before contacting him.
Don't contact him for a week or two and think whether you will be comfortable with it or not.