Can u become paranoid from weed?

Most Definitely. Cannabis can cause paranoid delusions as well as hallucinations. Everyone is different & has their own genetic predisposition as well as life stressors. The fact that someone else can smoke marijuana without having problems doesn't mean you won't. A recent study in the uk linked cannabis with the onset of schizophrenia.
Yes . Marijuana is well known to cause paranoid ideation either idiosyncratic ally on first use or as a long term consequence of regular use. A cannabis induced psychosis is also not uncommon.