Confused.

Jovie
I usually don't go to the Internet with my problems, but none of my friends have advice for me. 
I am fifteen years old, in a relationship with a man. 
We've been together for about a year, and now we're long distance. 
He barely talks to me, I have no phone so we have to message of Facebook. 
It will say he's active and as soon as I text him he's off. 
I'll text him and see he was active after I had sent the message but never read it. 
I know I seem psycho, but it's like he barely makes an effort to talk to me. 
And to make things worse, I've been confused about my sexuality. 
I identify as a Bisexual female who prefers females. 
But as of late I'm starting to not like men. I have no idea if it's the distance getting to me or if I'm actually a lesbian. 
Help?