Does Height Matter?

this is my friend Abel's story.He and his g.f. were classmates in high school,and in college they fell in love with each other but neith of them told out.everything was going well and both of them were single all the college time.in 2004,Abel entered the postgraduate study in Jinan while his g.f. was also entered but in Guangzhou.althougt the long distance,they kept in touch more closer.in 2006 the relationship had been fixed.everyone envy this sincere lovers.after graduated from school,the relationship has been kept from then on.one is in Guangzhou and the other in Beijing--the distance cannot make their love colder at all... 

but Abel told me he had a bad spring festval holiday today on net,which baz his parents didnot agree on this relationship. the reason is focus on the height: Abel is about 178cm and the girl is 155cm tall. just this makes Abel in trouble,how can him do?...he hasnot told his g.f. all the thing...