Is she lying to me?

So me and this girl have been talking for a while and I thought we really liked each other. We met once but we met on Facebook dating. She said she isn’t talking to anybody else but me. Well long story short I looked on her profile on fb dating and she updated her bio and her pictures. That just makes me so sad. I confronted her and she claims she was just updating her pictures. If that’s the case why go on there if you’re not talking to anyone? I don’t understand , I know we aren’t dating but if I like someone I’m not going to talk to other people

Is she lying to me?
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