You've been on three dates 'only'. You still don't know this person; I believe it's normal that his dating profile is still up. I just think it's sad that you youngsters find each other through the Internet instead of traditional meeting places. I'm behind the times I'm sure, but how can you trust someone that your social circle doesn't know? As a mother I find it intimidating and a bit risky.
All the best to you and don't worry.
Remember though, if your instict is telling you this is a 'bad seed' trust it.