It takes a great guy to fess up, so good for you. The conversation does not need to be weird, STD’s are a fact of life. Don’t be looking at getting physical right off, hold off for 1-3 dates, but that’s all. Take her out to dinner and have a great time so she can see what she’ll be missing if she hits the road. When you tell her, do it privately. Explain what it is and how you control it and what you do to stay safe. If she stays, stick to your word and take all precautions.