I thought I caught my girlfriend "cheating" or at least looking to potentially on me online- she denies it, and she has never lied to me before.
Basically, posted things online saying she was looking for someone she's interested in and waiting for a response from this person- I discovered this when I saw a response in her email- I looked up the post, replied to it myself... and the message went straight into her email inbox. So I know without a doubt it was her.
I confronted her and she denies that there was anything going on.
She says she made it up, that it's not true, that she never had anyone in mind, she was just bored and lonely and pretending there was someone... sort of like a fantasy I guess, making someone up for some excitement and seeing how people responded.
She is the most honest person I know- swore on her recently deceased father that it wasn't true- and I want to believe her.
Mostly, I do. And when I'm with her and talk to her about it, I feel more at ease. But when I'm away from her, it drives me crazy- my mind wanders, I start to think about how it just doesn't make sense...
... but at the same time, I really don't believe she would do anything to hurt me.
Where do I go from here? Any advice?
I don't want to keep bringing it up- it upsets her when I do.
Esp. if it's really true that there was nothing going on, I don't want to unnecessarily put her through hell about it.
So, aside from talking about it more, what can be done? Any thoughts would be appreciated.
Thanks.

Sorry to be so blunt but, if you believe a single word of what she's told you then I've got some prime real estate in Florida that I'd like to sell you, real cheap. Get the point? Make your decisions accordingly and be true to yourself first and foremost.