she seems pretty normal to me. like nal said, the way you talk back to her thru text doesn't sound very polite or doesn't really make sense
if you've said she's thought about Self Delete then im guessing she must be very sensitive, and maybe she's gone through depression or currently going through it. it probably doesn't help that her best friend's behavior is vague and ambiguous towards her feelings, so it doesn't make her feel much better.