付き合ってるのに片思いの英語

unrequited love

I don't like unrequited love.

one-sided love

unrequited love

He's moping because he's lost his girl [because his girl doesn't love him any more].

to love each other

be hopelessly in love

to be fettered by the yoke of love

Love is attended with sorrows

her amatory affairs

“Love and lordship like not fellowship.”【イディオム・格言的】

It was a one-sided love affair.

To be in love with love

to pine for love―languish for love

something that interferes with love

someone who is a person's secret love

I am falling in love.

a pining for a loved one

a relationship of persons who love each other

one's lover

to invite one's lover

to give up the object of one's ardent passion―have done with a man or a woman

to experience the sorrows of love

to win the love of someone or something

to pine for love―languish for love

“A fence between makes love more keen.”【イディオム・格言的】

I have a confession to make.

to aspire to one's hand

a rival in love

to pine for love―languish for love