Yes, go with her. It's called parenting.
My 17-year-old daughter has befriended an 18-year-old boy (a friend of a friend of hers) online. They have talked on FaceTime, and her friend has confirmed who he is, so I’m not worried that he’s misrepresenting himself. However, he lives two hours away, and my daughter wants to meet him for a date somewhere in the middle. I am anxious about this idea. I do not know this young man, and I’m very skeptical of the online friendship that teens seem to acquire so easily. Should I go with her? Should she take a friend? I don’t want her driving off alone to meet someone I’ve never met.