<human>: Can you condense the text into a few key points?

Hi /r/relationships.

I come to you all today seeking advice. I'm currently in a long distance relationship with my girlfriend, we see each other once every month ~ few months, and we're ok with that, as university and work schedules often clash. I'm in love with her, 99% of the time, but there's this small thing that's holding me back.

All my life I've been told by the people around me that I'll never be successful, I'll never meet someone special, etc. etc. This has led me to be pretty self-conscious, and also makes me sometimes feel that I'm not good enough for my girlfriend. 

The problem that I have at the moment, is how she talks to other guys. I've seen her Facebook private messages (not snooping), and seen skype conversations with people, and she frequently says things like "xoxoxo", "baby", "you're amazing" and other shit like that. I trust her, and she promises that she's committed to the relationship and that she only ever thinks of me. All of this bothers me, probably because I'm a little fucked up with self-confidence problems. I talked to her about this, and she got defensive and angry at me, which is understandable. 

What should I do? Am I in the wrong here? Do females use this sort of language around other people / does it not mean as much as I think it means? 

Any advice would be greatly appreciated!
<bot>: Girlfriend uses words like "xoxoxo" "baby" "you're amazing" when talking to other guys. Should I be concerned, or am I just overreacting?