Be head over heels
Be in love with somebody very much
坠入爱河，爱得神魂颠倒
- He is head over heels in love with that girl.
他深深地爱恋着那位姑娘。
Fall in love with
Start feeling love towards somebody
爱上（某人），（与某人）相爱
- Slowly but surely she started to fall in love with him.
虽然过程缓慢，但她无疑开始爱上他了。
Hook, line, and sinker
To be completely deceived
完全相信（某人的谎言）
- She told him she needed the money for her baby and he fell for it hook, line, and sinker.
她告诉他，她需要这笔钱给孩子用，他便完全相信了。
Break up/Split up
End the relationship
（婚姻）破裂；离婚；分手
- She's just broken up with her boyfriend.
她刚和男朋友分手。
Have/Got the hots for somebody
Finding somebody extremely attractive
非常想和（某人）上床
- She's got the hots for this guy in her office.
她非常想和她办公室里的这个男人上床。
Kiss and make up
Make peace after an argument
言归于好，和解
- Let's kiss and make up.
让我们言归于好吧！
Love rat
Somebody who cheats on his/her partner
（男性）偷情者，偷腥的人（该词常用于通俗报纸中）
- The womanising of royal love rat James Hewitt.
情场老千詹姆斯·休伊特的花心行径。
Tie the knot
Get married
结婚
- So when are you two going to tie the knot?
那么你俩什么时候结婚呢？
(be sb's) Main squeeze
Committed romantic partner
是（某人的）情人
- My main squeeze cleaned me out last night.
我的那位昨晚把我全榨干了。
