'She doesn't like our pictures to go up on FB'

I like putting up photographs of myself with my girlfriend on Facebook whenever we go out. She is not comfortable with it though. Do you think she's embarrassed to be seen in public with me? I don't know what to do.
If she doesn't want her photographs up, she probably just doesn't like the idea of the world commenting on her relationship. Not everyone lives for Facebook likes; some people actually have a life. If she were embarrassed to be with you, she would have ended this relationship a while ago. What if you were the one with the problem and she insisted on tagging you in her photographs? Grow up.

I have been in a relationship for almost a year and a half. We broke up last year on account of some trust issues, but have been back together for a while now. The problem is, we have nothing to talk about. She is just not interested in talking to me, until I ask her something specific. What should I do? I don't think she trusts me. Could it be something else?
If she didn't trust you, I think the chances of her getting back with you would have been slim, let alone her continuing to stay with you for all this time. If she has nothing to say, this has more to do with poor communication than trust issues. What did the two of you talk about before? Have you asked her why she has nothing to say to you? Have you asked her how she feels about you and this relationship, or about what she thinks you can do to make things better between the two of you? Maybe discussing this relationship will prompt her to open up a little more. Or maybe you can open up a little and tell her how you feel, which may prompt her to do the same. Either way, she is the one you should be having this conversation with.