Not "Sober" but do not drink.

M(44) (not in recovery) I was out on a first date at a nicer restaurant, I did not order a drink from the bar because I choose not to drink, I don't mind if people around me drink, it's just not my thing at the moment. The woman I was with seemed uncomfortable, or confused by this because I did not have an explanation as to why I didn't want a drink with alcohol. Is it weird for me to not drink if the other person does, I am not looking to date "sober" people, I don't mind if my date wants to have some drinks. I would have a drink if I wanted to.