It doesn't feel right..?

Hey, so I have a girlfriend named Suzy. Actually, I'm just with her because her friends are pretty hot. She isn't really good looking with her fuzzy yellowish hair and her giant fishy blue eyes, I have to admit that. She enjoys being with her bfs so every time we meet at the mall, I allow her to bring the clique. That means I can hang out with the hot girls, this is very important because whenever one of the other boys sees me, he must think I'm such a cool dude. I secretly hope that one of these boys is gay, just like me. The first step is making him think that I'm a super attractive male. Maybe I'll even make one of them turn gay. Don't get me wrong, I'm NOT taking advantage of my gf! She's just with me because apparently, I look like her favorite singer and sometimes, she takes pictures of us and uploads them on instragram in order to make the other fans of that singer jealous. Yesterday she told the fandom that she is pregnant and she even took a photo of a positive pregnancy test and now I'm concerned. Not only about my future but also about the singer's future. I never had sex with her so gladly, I'm not the father but that means that either she cheated on me which is hard to believe due to her ugliness... or she raped me while I was asleep. How can I find pieces of evidence? Maybe I have to mention that I always sleep naked because I'm afraid to strangle myself while I'm asleep since I always dream of being super depressed and suicidal Batman. It's getting harder to trust her and somehow it feels wrong to me? Or am I just too inexperienced ?