What is a petty reason Ты won't дата someone?

I guess not knowing what Любовь is and following there сердце ?

Ты know that you're not sure to trust them, или your mind and сердце tell Ты 2 different things. Sometimes (personal experience) Ты know that something is telling Ты that Ты don't know if that person Ты wanna date/are dating is good или bad.