So this has been going on for a while and I have finally decided to seek advice on it.
So me and my girlfriend have been dating for almost a year now and were together for a few months before that. We are both nearing the end of our college careers and looking towards the future and trying to plan things out accordingly with each other but I am hesistant because of how she has become so distant towards me and feels the need to lie about small things. About two months ago she went on a vacation with her family that I was supposed to go on and her parents decided at the last second that they only wanted their family to go. While there we texted like usual and everything was great. One night she decided to go drink with her younger brother and told me that he had met a girl and they were going to her condo and she was going to supervise. She also told me to call her when I got home (one of my best friends kid was turning 2 so I went to his parents house to celebrate). When I got back to my house I called her and she didnt answer so I didnt think anything of it and figured she was already alseep. She then called me at 5 AM and told me her brother had gotten sick and that she had to take care of him and couldn't answer. Then she told me there was a guy there her age and that nothing happened. 2 weeks later when we were together she told me to send a picture from her phone to my computer so we could print it out and frame it(true story, I give her space and make sure not to look through her things because I do not want to cause a conflict that could easily be avoided and try to put my trust in her). While on her phone there were about 20 pictures from that night with about 7 or 8 guys and her and I asked her about it. When I did she got all made and started making excuses for not telling me the truth and tried to tell me nothing happened but I found it hard to trust her. Since then she has been very distant and we have had very little sex ( 4 times in 2 months). Also she lies to me about who is with her and her friends when they have girls night.
I tried to keep it short and can add details to the incidents in question if needed.
Can anyone help me with how I should confront her and try to figure things out?
Confused and hurt boyfriend.