Guys, I met this girl in 1 January 2017.I invested emotionally in her because i thought she is different and now I love her very much, Ive done it with my own hands.Now i am stuck between the RED and the BLUE. Ill be short. Story: I spoke to this girl everyday since january, we fucked on 1 may,We were into a secret relationship, she didnt want people to know that we are togheter because she`s been with 2 more guys from the Campus.Long story short, after 5 months she is locking herself in her room with a guy that she is ,,friends'' for 4 years.I go in there, i hear nothing, i wait at the door and the guy exits and run. i confront him, he says that he closed the door and they just talk, i confront her and she says that she locked the door and just talk.I somehow believe it even though I know the redpill and forget about the situation.Now she was speaking in a video call with a guy that she says is her brother(she says that he told her that he sees a dick between her legs and they are just friends, she was telkling me that she slept with him in the same bed without doing nothing and spoke to him a lot.) I called her with video and she didint respond, just after she end the call with her bff.

The problem is that she seems like a good girl and i dont know if she is lying or telling the truth.Tell me what to do, I am stuck,Help a fellow guy to take the pill.

What should i do ?