I have couple of girls interested in me now... But I want all of them, am I weird? I don't want to lose them but ı don't want to be exclusive...

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For example, I'm with a girl in a project... this girl, her guy friend and me. We are meeting every few weeks and met a few times until now. She was interested in me from the start, even in corridor before we were separated into groups she was staring at me, then we got into the same group, she was all shaky nervous, she still is, I can feel the attraction so strongly, I don't know if this was set but today at the end of the class her guy friend left early we two just left, I didn't escalate because she wants a relationship? And she is 20, is there any way I can make this into hook up rather than relationship. She is really cute but I have other girls around I don't want to lose, almost all wants a relationship I guess but I want all of them, I can even love all of them. And the idea of her talking to his friend about the attraction she feels to me makes me feel uncomfortable, she seems so dependent to her close friend. also I don't know why this guy wasn't jealous or anything coz she is really cute and he is single.