Daughters Friend are getting too friendly.

My daughter had her last birthday party at the house before she moves on to better things in the real world. She had all her friends over, mostly those that she grew up with in the neighborhood. So pretty much I've seen them since they were about 10 now all grown up. I did my duty, I just wanted to relax and let her enjoy her moment. One of her friends, kept calling me by my name instead of the old "Mr. Z" I thought nothing of it, whatever, but consistently coming to me, smiling, telling me about her job, dating drama, hugging me, and being a bit too little touchy. After the small party, she came up to me and told me if I was feeling lonely she wasn't going to leave town if I ever needed any help with chores or anything. Thats never gonna happen lol. Still kids in my eyes lol.