OP Here, thanks for the comments, while I want to give her a chance, especially since I contributed to leading her on, I also sense that emotional clingy-ness, and get leery of that, even if I haven't heard back from LocalGirl yet...

I sent OnlineGirl an honest & rather "diffusing", in my opinion, e-mail, to leave the door open, and explain that I'm not a guy who "dates a different girl every day of the week", which I'm not...

I said she didn't need to apologize for the last e-mail, and I apologized for leading her on, because it wasn't my intent to, she is a great person, and I was only trying to be honest.

I confirmed that everything I said was the real me, and that I didn't want to rush into anything, because I've done that before;

I explained about being fair to other people meaning that "other than a friend I honestly went out with a week & a half ago about the time I started talking to you", any online people haven't been talked to regularly like her, which is also why I called her to see what she sounded like, and that she should feel I think she's nothing; I mentioned that I would never have girls "competing" over me;

I mentioned understanding how it's hard to be a friend when you've got feelings, and I'm not a guy who wants "friends", and that I'm sorry I made things sound way worse in my last e-mail, and that I'm obviously not perfect, as you can see I've got my flaws;

I closed there... I do want to give her a chance, considering I let myself get drawn into her "lovey dovey" e-mails, and didn't keep it casual, so I feel guilty to smack things to casual now, but I also understand what people have said about her clingy-ness at falling into a "serious relationship" too fast...