So, I'm not 100% sure this is a female betta...

[SirensEye00]

I have never seen one with fins so long, and I can't seem to find the tube people said to look for. So i'll post pictures, and get you guy's opinions. What do you think?

Aggression wise, it has been very calm. Messes with no other fish. Hasn't made any type of bubble nest. The first picture is still when it was in its little cup, don't think im cruel.

 

[Bubble_B0y]

females have a "white dot" on their neck/under their chin

 

[Mumma.of.two]

I can't see any pictures.
Female bettas usually have an ovipositor. A white dot under the body just before the anal fin. Females are usually thicker then male bettas. Males have 'beards'. Their gills stuck out a touch under their 'chin'. Most females don't.