my bf got picked up for a warrant, for 1st time probation violation for way less than an ounce of weed on him, anyone who as been here before in his shoes, will he be in jail for a long time, when will I see him again?

Violation of parole is dumb. You put yourself at the mercy of the judge that had leniency for you. The penalty could be as stiff as having to finish the remaining months on the original sentence with no possibility of an early release. Anything less than that, he should consider himself lucky.