My ex hangs around me a lot in class. Lately, he ignores me but glances at me in class. What does this mean?

He's recently only 1/8 straight, so we've just been friends. Were taking an ecstasy together soon... and his intentions with that r suspicious. He became distant before he asked me out, but I guess I glance at him without realizing it sometimes, because I still like him. Is glancing something that comes without thought when u like someone...or could he just be creeped out at me?