Why is he ignoring me?

Okay so I've been dating this guy for around 2 weeks now and all of a sudden he just started ignoring me.. He looks at me when he thinks I'm not looking but never talks to me... I think it has something to do with this prick that keeps making comments like "If you won't bang her Steve will" And stuff like that... It's making me really sad, what should i do?
Why is he ignoring me?
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