New baby; toddler not having it

My toddler is having a hard, hard time with having a new baby sister. Namely, sharing his mommy. He now wants me constantly, and especially when baby sister needs me. He gets SO irate- screams and cries until he is hoarse and will not reason or listen or accept comfort. He is 2.

We are all about gentle parenting and helping him understand and process these big feelings. But honestly I’m going to lose it. Anyone have experience with dealing with a similar issue, and either using tough love, or trying to empathize/reason? I know he’ll get over this eventually, I’m just trying to help him through it with the least amount of lasting trauma...