<human>: Summarize the given text in a few sentences.

Hello /r/relationships,

I have been dating this girl who has always had same-sex curiosity throughout our entire relationship. She has described her experiences with the same sex, and I know it is a great part of her life.

Recently, she has told me she lied to me about her plans to go hang out with some friends for a post-graduation get together. She said she wasn't actually going to see some friends, but instead going get some coffee with a girl she met on Instagram, whom she met through one of her close friends. She explained to me that isn't a date, but purely for building a friendship. She then proceeded to send me pictures of said girl that she was going to get coffee with.

However, here's the kicker. The pictures she sent of the girl were not retrieved from Instagram, but instead gotten from the dating app called "Her." For context, "Her" is a dating app for lesbians. I could tell this was the case because the pictures that my girlfriend sent of the girl had the little gray heart at the bottom right of each one, meaning she was looking at her profile on the dating app. Furthermore, my girlfriend has not told me she has been using this app, and whenever she uses said app, she attempts to hide her phone from me. 

Additionally, when I noticed things were acting a little strange, she accused me of never trusting her. While I understand where she is coming from, it is very hard for me to trust someone after they blatantly lied to me. She still get's random notification sounds from her phone, which means the sound goes off whenever she receives a message but doesn't get the actual notification on her front screen. 

While I have not confronted her yet about her lying to me, I'm curious as to what I should do. Should I confront her about her not telling the complete truth? Am I being too soft and should just end things now? I am all out of ideas and I need advice.
<bot>: I found out my girlfriend lied to me about how she met someone through a friend, is actually using a lesbian dating app and hasn't told me about how she actually met her. I found out through small investigation.