<human>: Okay, firstly I hope this is the right place to post this. I know it's first world problem bullshit but because of abusive relationships, and problems when growing up, I subsequently suck at relationships. 

I and my girlfriend (whom I've been with for a year,) go to the same college, we also attend some of the same classes and therefor know the same people. During one of my classes I'm with one of her close friends who she seams to think flirts with me. We argue about this allot, and I think it's ridiculous but whatever, I literally never talk to this girl if we weren't in the same class we wouldn't even acknowledge each-others existence.
     
My girlfriend texts me constantly in my lessons and if I don't reply it's because i'm 'flirting with her.' She also got like this when I accidentally sent, 'I lava you,' which is an inside pun to another girl by accident- yes is was really an accident I have no reason to lie.

She also just goes crazy when I don't answer my texts straight away, like when i'm with my friends. I've explained it's rude to start texting mid-face-to-face interaction, but she just argues. I guess that is partly my fault to though as I don't say I can't reply but I think she'd be able to make that assumption; or maybe that's just be being a dick.

I think these problems stem from issues with her ex; who left her for another girl, he also used to ignore her text messages.

Could you distill the essence of the text into 1-3 sentences?
<bot>: I think my girlfriend has trust issues, how do I solve these problems without being a shit-bag or hurting her feelings?