1.hit it off 合得来;
2.on the rocks 恋情告急;
3. pop the question 求婚;
4. tie the knot 结婚;
5.fall head over heels 爱到死心塌地;
6. puppy love 早恋/少男少女间短暂的爱情;
7. settle down 成家/安家。