失恋的英文：
be disappointed in a love affair
be crossed in love
wear the willow

参考例句：

He was disappointed in love.
他失恋了。

She was disappointed in love
她失恋了。

Mary went mad because she was disappointed in a love affair
玛丽因失恋而发疯。

Day by day the disappointed lover peaked and pined.
这失恋的人一天天地憔悴下去。

Hsieh-ch'an knew all about Hsin-mei's being jilted
辛楣的失恋，斜川全知道的。

Among them were many lovelorn maids and bachelors, and men of disappointed ambition in politics
在他们中间有许多失恋的独身男女，有失意官场的人物。

Once again he was disappointed in love, with his heart being like a dead tree.
他又一次失恋，心如槁木。

Once again he was disappointed in love.
他又一次失恋了。

Where love fails, we espy all faults .
一旦失恋，缺点易见。

He took heroin for the first time when he was on the rebound from a broken relationship.
他第一次吸食海洛因是在一次失恋之后的失意期。

disappointed是什么意思：
adj. 失望的；沮丧的

The act of disappointing.
使人失望的行为

The poorness of the play disappointed the audience.
这出剧的拙劣令观众失望了。

This disappointed his plans.
这件事使他的计划落空了。

love是什么意思：
n. 喜爱；热爱；酷爱；恋爱；爱情，爱意；喜爱的事物；爱人
v. 爱；喜欢；热爱；爱慕

Love is the reward of love
爱别人才会被人爱

Love is the true price of love
爱情只能用爱情来报答

A labour of love
乐于做的事

affair是什么意思：
n. 事务；事件；风流韵事

You have to investigate into this affair.
你必须调查研究这件事。

The affair had a strange sequel.
这一事件的结局很奇怪。

A committee was constituted to investigate into that affair.
建立了一个委员会以调查那件事。