Okay, instead of drawing this out (ive seen some huge walls of text with pointless info) let me break it down to this:
1) Dating this girl for almost 2 years and live with her
2) I have a little jealousy issue (expected at 2 years) but she has them too (worse)
3) She texted guy co-worker and lied about who shes txting and then I leaned in to kiss her and saw his text pop up and she turned red as fire and said "just friend" etc. i read it and it said shed miss him etc.. since he was leaving town for a while.. (still not really really shady cause of the first part of point 4)
4) Did some crazy spy work (and nothing seems too shady.. except she lied to me a second time about talking to them when asked nicely.. then admitted after I said she has a "tell" when she's lying)
5) Her excuse was she thought i'd get mad and flip. (aka jealous)
6) Stuff was great for a bit.
7) Girl hangs out with her chick friend from the same work and her boyfriend (i was here) the other night quietly talking.

More spy work shows they were talking about something that the girl wanted to talk about in person but my gf basically didn't want to talk about over text.
Now, thats the timeline of the issue. I'm a bit insecure etc, I don't need all that talk.. I know those issues and I sure hide it a lot.. been working on it a good bit actually... but what I don't understand is why I have a gut feeling something is up?
I trusted this girl, and she was lying about txts. i told her i didnt mind if she txted friends just dont hide or lie to me.. she said okay.. went back and did it again.. and i caught it the second time.. but for some reason since I met her friend and her boyfriend the other night and now they cant talk of certain things over text I feel really really weird. Much more than when I had the first gut feeling.
Now this could all be innocent etc.. maybe the convo is about her being pissed with her b/f and he goes through her phone etc.. idk.. but...
Is this gut feeling warranted or am I just paranoid? The girl's only 18 btw. (YES I KNOW!) lol. I've always had a vibe about things and I'm generally right 95% of the time in some form.