<human>: Provide a brief overview of the text.

Me and my girlfriend have been dating for about 4 months now, and she keeps getting on me about my Facebook profile picture/banner and twitter picture. The problem she has with it is one of my female coworkers and friends was in both pictures (I've changed them since it started). She's never been anything except a friend, and never will be, but nothing I say seems to reassure my girlfriend. Also worth noting, the pictures aren't just the two of us. 

She seems to think that I'm just going to make an idiot out of her, and break up when my coworker becomes single. The pictures are absolutely meaningless to me and that's why I changed them, but she doesn't seem to see it that way. She's also said that I'm "Ashamed to show her off". That's a complete lie, and I don't have any pictures of us to post. I want a picture of us, I just hate taking pictures together. All the pictures I am in are just pictures someone has taken of me. 

So really, I'm coming here asking what to do. She keeps saying I don't see her side, and I guess I don't. I care about her so much and losing her would be devastating.
<bot>: Facebook/twitter pictures were me with another girl (coworker) and she doesn't seem to trust me, even though I've changed them.