Platonic jealousy
When a close friend of yours hangs out with someone else, and you feel jealous that they aren't hanging out with you.
Bob: Hey, where's Alice?
Carol: She's hanging out with Dana today. Just like yesterday...I think I'm coming down with a case of platonic jealousy.
Carol: She's hanging out with Dana today. Just like yesterday...I think I'm coming down with a case of platonic jealousy.