You know, i was going to come up with something clever to say until i saw your second post. All replies are now Jokes.
You can find out who deleted it, but there are certain privacy measures in place. Once you delete system 32 it should be pretty easy. either that or, you know, ask her...
Ok, well it's against Facebook TOS to give someone else your login credentials, so there's the error you should be more worried about. Also, I thought you were gay. Your pm to me a while ago was either in ignorance that I'm a guy or your in the closet and should quit leading these poor girls along and lying on here about wanting to ban them.
Since you have two threads... So, for some reason your girlfriend has this crazy impression, that she should be worried over your actions regarding other women, or from the sounds of it, girls. I wonder where she got this idea... considering, coincidentally, she's apparently right to be concerned. Until you change whatever it is you're doing, expect these kind of situations to come up from time to time. If you mess with a girls head too much and make it a little too obvious, eventually she's going to either leave, or you'll have succeeded in conditioning her to stoop to your level. In other words, when you find ways to be sneaky, she's going to wise up and get out, or she'll get the idea from YOU, that being sneaky in this particular relationship is ok. And that can include any number of things, from checking in on you, to being a little sneaky with another guy of her own... that doesn't make it right 'per se', except that you set the ground rules.