Why did he push me away?

Um was he repulsed or?

Hey okie so I have a male friend, we had a fling over two years ago (though we never had sex he wanted to go all the way but I kinda stopped things) Anyway we never dated he didn’t go out with me because of my self-conciousness and paranoia, but after sometime we did make friends again. My friend has had 2 g/fs since then I never met either of them. When I stay over my friends house I sleep in his bed with him, we always sleep close etc. The last time I slept over I had a long tshirt on and my underpants, and we were sleeping like spooning (except he did not have his hand around me) I felt him move his knees up closer to me at one point, I just thought it was okie as were friends his probs just comfortable, but like one point when we were sleeping close he pushed me foward/away from him by my butt, and suddenly turned over so he had his back to my back, I was confused lol? He layed on his front for a while too. When we were sleeping in a simlar posistion again he pushed my back away. But at one point he had his knee pressing against my crutch and when he moved a bit hed like move it back to that posistion :/. At one point in the night when I was facing him it looked like he had a boner but I’m not sure as he had skinny jeans on, but there was a bulge, and I saw a bulge when the covers were over him coming from that area, :/ Basically I’m confused as to if I offended him/he was repulsed or if he was just trying to conceal something.