Take...100 deep breaths. [Don't hyperventilate]
Okay, this Johnny guy is either
A. Confused.
B. Playing you, and his gf. Or one or the other. Idk.
C. Some other reason.

1. He snapped at you cuz he was angry. People tend to do that. So don't get overly upset about it. People say stupid shit they don't always mean when they are angry.
2. So, he liked you when you liked someone else. Getoverit.
3. Your friend Rosie can have her own opinion but that doesn't mean she is right or wrong.
4. Wtf love rectangle??!?!? *dies*
5. Here's what you do. CALM YOUR FUCKING SELF.
GODDAMN.
Okay, now that I've gotten that out.
After calming yourself, you should prolly just wait to see how this pans out a bit.
Let PJ move on from Johnny.
See if he's gonna break up with his gf [Taylor? Too lazy to scroll and check].
If there is no sign he is going to, forget him.
And I know that's hard "I can't forget him it's just UGHHH"
If it's never going to go anywhere, you have to. Because you can't wait for this guy for forever, when he's clearly not making any move to do anything about Taylor and this love rectangle bullshit going on.

And I may have more advice later, but I figure I should post this before you have some kinda of aneurysm.

LMAO. I laughed xD

Oh onemorethingIforgottoadd....

He doesn't want to be in a relationship. And he has this effect on making me flirt a lot. Like in an almost desperate way. It scares me. It really scares me.

Uh. Yeah. I'm going to ask him tonight when he's going to break up with her.

xD
Oh and PJ has moved on, to another guy...he's bisexual. I was like OMG YOU'RE GAY?! Coz Pj's like..hot :P

So he was like NO SARAH I'M BI.

:P
twas funny xD

So, then if he breaks up with her, then you two can just freely like each other.
After a while, he may want to be in a relationship again, but he'll need time.

At least now it's only a love triangle?? =/

I see...yeah.
It's confusing though!
Because idk if Rosie is right or Pj is right so I'm like...yeah. :S

What do YOU think Sarah?

I think he might like me but I'm scared he'll change his mind and just stick with Taylor.
And I'm scared coz I'm falling
D;

Then stick with what you think.
Other people's opinions are to be valued, and taken into account, but not meant to replace your own completely. Just because your friend thinks something doesn't mean he/she is right, or wrong.

Hm. :/ That sucks Sarah, what an ass.