Looking for a single woman for a serious relationship – 45-60 years old

I am 49 years old and looking for a single woman aged between 45 and 60 years. I am interested in a serious relationship, not an adventure. I am 173 cm tall, have dark hair and dark brown eyes. I live in Brooklyn, have no children and lead an active life. If you are married, please do not reply. You can leave your phone number.