Soft spot

[Rihanna]

Its a feeling that you have in a girl/boy. Liking that person so much. You cant think of anything except for that special someone.

[Mark Zuckerberg]

a sentimental fondness or affection

[Justin Bieber]

A fondness or affection for someone.

Sometimes used to denote the feeling you have for someone who is a friend, and that you might [fancy], if such feelings werent inappropriate.

[Little_Girl]

A soft spot is a topic you have used to invoke a dramatic and negative emotional reaction from the other person, said with a sing-songy high inflection.

[Zipporah Schumaker]

to feel that you like someone very much: