Hard to do.

Don’t know that that happens on the spot.

This kind of question would give me an existential crisis if I allowed it. The long story short version is, I would probably struggle to do so.

You're asking the wrong muchacho I wouldn't know love (true or not) if it smothered me to death by sitting on my face

Trial and error.

Asking myself a series of questions: do they like kpop? are they ugly? am I ugly? do they really like me? are they too tall? are they too touchy? would it be boring to spend some time with them?

If the answer to the first question is yes, then they are definitely worthy of the "true love" status.