<human>: Can you succinctly summarize the text in 1-3 sentences?

This is my first "serious" relationship, first relationship I could see leading to marriage. 

Don't get me wrong, there's no evidence of infidelity or anything, just a lot of opportunity...

 - She has the occasional "girls night" which usually revolves around drinking at bars, concerts, etc.

 - She's a little more distant through text messages/phone calls when we have periods apart then she use to be (long response times, doesn't seem to care what I'm doing, etc.)

 - She's been picking up work shifts at her low paying part-timey job left and right... probably just being paranoid but thoughts of  "damn son... she meet some one at work or something...?" 

There's a few other things... she gets a lot of text... social media... she's not very open about whose texting her or anything... 

With all that said I knew her ex of two years and she was never a cheater... IDK. Just having a hard time sometimes night after night having to say "OKAY babe have fun..." when I'm told she's doing something that sounds relatively innocent on the surface, even though I have slight anxiety over it and I got to just swallow it at face value.
<bot>: In a longish relationship with a flirty but so far totally loyal girl... she's been going out/working more... how to handle anxiety over possibly being cheated on?