[romaji & translation] meaning of Love

[truehappiness]

Actually, this is the direct translation and I'm not so confident of it.

ureshi sou = look happy
mejiri = tail of one's eyes
sageru = down

If someone has a good idea of translating this line, please post here.

I looked it up and mejiri apparently is the "corner" of one's eyes?

mejiri sageru -> mejiri o sageru (目尻を下げる) to make eyes -> making a happy face or something?

( with slanting eyes, slant-eyed [-> 上がった] -> slanting eyes might be like when you smile really wide and your eyes get kind of small and slanty?)

You suddenly smile innocently
Happily with your tail of eyes down

=

You suddenly smile innocently
Happily looking down with slanted eyes

? -sigh-

Konna omoi no koto o kitto
Hito wa ai to yobu no darou

I suppose people will surely call
This kind of thought love

I think this would be better if translated like:

I guess (or think or even 'perhaps') this feeling is
Definitely (or surely) what people call love

Or maybe that doesn't fit.. hm.