Is she trying to make me jealous?

Ahh shes not being very nice :/ but In a way i guess its hard for her knowing that shes liked him alot longer than you and he has never felt the same way back towards her so shes trying to make you jealous and put you off him so she would have him all to herself again. Anyway I would just ignore her and the stupid things she says because its pretty obvious who he likes :) x