Braceface (2001)

S1E2 Crushed

After receiving acupuncture to alleviate his allergies, Conner, Sharon's friend, experiences a remarkable boost in self-esteem. As he begins to spend more time with Tally, the girl he's been smitten with, Sharon finds herself feeling envious. This unexpected jealousy leads her to realize that she might actually have feelings for Conner as well!