Could I have borderline personality disorder?

[Breakfreeflyaway]

Hello! I'm sixteen, and I've had depression for five years. I told my mom around last December, and a few months after that began seeing a therapist. I think I might have borderline personality disorder because I've been depressed, I get spouts of anger or irritation at the smallest things, I always have crushes that just randomly fade away and fade back, I would feel like I'm in love one day, and not even want to think about them that night. Also, if I feel even a hint of bad feelings from any of my friends or they talk to someone else instead of me, I get really upset, and a lot of the time just leave them or don't talk to them until I forget, typically just an hour or less. With my best friend, if she talks to other people then I get upset, and I sometimes get really mad at her for stupid things and send long angry texts. I also feel empty a lot, and really want to die.
Could I have BPD? Thanks!