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

I (m25) and my gf (f24) currently are snapchat free. Been together 2.5 years, had snapchat when I first became popular but it caused tension due to certain people constantly sending inappropriate pictures to my girlfriend and also a few girls were snapping me a lot and showing up on my top friends list.
I would like to say that it was only jealousy, but I like to think back to before snapchat...would it have been just as accepted if you were having a conversation with an ex via text message and sending more photos than text back and forth? I don't think the app can be used to justify what really goes on.

Anyways, she is deployed right now, comes home in 2 weeks and she just asked me if I would be mad if she got a snapchat again. I kind of am mad a little Bit that she would even want to have one after the problems it caused us before. I'm also questioning our relationship at this point because I am torn over why I even got mad in the first place. Do I not trust her? 
I guess I just liked not having my girlfriend swapping pictures with anyone and everyone on a daily basis and the "phubbing" as they call it, is bad enough between the texting, facebooking and instagraming...snapchat would be one more thing added to that list. 
I already feel a lot of pressure trying to be the most interesting and worthwhile thing/person in the room but with technology nowadays I am competing with literally the entire world.
Am I just old fashioned on preferring that when I'm with someone I value their attention more than their physical closeness? I've gone to dinner with people that don't put their phone down and the time spent isn't actually spending time with them rather near them.
<bot>: gf wants to bring snapchat back into our relationship, not sure if I don't trust her or just getting tired of social apps being the third wheel 24/7.