How to deal with an insecure girl?

So i know a girl that has a huge crush on me for at least 2 years and she is so insecure that turn me off, so i always try to pretend I do not understand her signals (About her liking me)

She is always saying that wants to be hugged, and is ugly (its not), is fat and bla bla

She already dated a ugly guy, completely off her legue just bc its insecure (she end up with him bc liked another person (yes it me but i pretend i don´t know).

Now she ask me on a date, and i don´t know what to do!

-Should i just say i don´t like her bc she is insecure and has slow self-esteem (this can afect her ego even more)
or
-Sould i try to have a relation with her and try chance that mindset she has? (wich i don´t belive its likelly)

How to deal with a insecure girl?
How to deal with an insecure girl?
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