when you are being so rational, hesitating whether you should go out with this person or not
you are not really in love with this person.

when you are thinking how different this person is from you and how that be the obstacle for the relationship, you are not in love enough with this person

when you are thinking how being together can ruin the friendship between you two and thinking that friends can be forever but lovers can't
you are not in love with this person.

when you are truly in love,
it doesn't matter how different you two are
it doesn't matter how long you want the friendship to last
you can't even make rational decisions

you just want to be this person, truly and fully
you dive right into it