Mood swings

This was actually a riddle i thought of. But, since it was too hard. It could fit for a riddle

She comes when you have a crush
Love is her partner
She crept into your heart
She toys with your mood
Feelings, her slave
She is actually an illusion
she wont go
Company scares her
They are like Romeo and Juliet
She will always be there

Author's Note

Well so, did anyone guess that it was moodswing?