I don't think you are being overprotective at all. There are creeps who will come on all charming to women just to get at and molest the kids. Listen to your internal radar. I would frankly not tell my kids I was dating someone until things got very serious, like, marriage looked likely. You don't want to worry them or wear them out with a series of boyfriends, and frankly it bugs most kids when they are faced with a dating parent. If you are new at dating, I would think you don't intend to marry the first or second guy you begin to date. So, I would say, play it low key.