"爱情是可遇不可求的 "用英语怎么说啊

love is something you can encounter rather than beg for.

encounter
vt.遭遇; 不期而遇; 对抗;
n.相遇，碰见; 遭遇战; 对决，冲突;
vi.碰见，尤指不期而遇;

beg
vt.& vi.乞讨; （原谅） 恳求; （问题） 回避;

Love is something reachable but not willable.

备注：
reachable adj.可达成的, 可获得的
willable adj.可以要怎样就怎样的,可凭意志决定的

love is something you can encounter rather than beg for.

Love is possibly coming by something with luck but not by searching for
Love can not make happen

我想是:Love is ong thing that you can meet with but can not ask for.