I'm so sick of this!

okay so I'll tell you what happened today..

So basically BGF and I were quite close today..as in all we did was hang out and talk and really it seemed like all he wanted was my company. He could deny it all he liked, it definitely seemed this way. anyway, despite this, because he's so damn likable, every time we had a chance to hang out as just the two of us, everyone else would always come and sit with us. We legit, never had a chance to ourselves, Maybe 20 minutes at most if we were lucky. So any way I could ignore that, get over it..whatever, the usual. But what really cheesed me off was the end of the day. Just as the bell for last period went, BGF asked me to stay because he wanted to talk to me. There were two other people in the art room, one of them a close friend of mine I might add. So when I said yeah whats up he turned around and said in a humorous manner "Oh yeah, I just wanna confess my undying lover for you." so naturally at this point my heart did a little skip. Obviously I composed myself within a millisecond of recognizing his humor and went along with it saying "well what can I say? I have that effect on people" But then he still did want me to stay back, he was being dead serious about that. But what happened next is really what infuriates me the most. My close friend then turned around and said.."Hey Mazz? Don't you have a bus to catch?" WTF!!! She knows about how I feel about BGF yet she turned around and practically ruined any moment of possibility of him telling me any hidden feelings for me!!!! I am so damn angry right now. I mean like, tbh, I'm pretty sure this was the case because if I know my BGF and trust me, I know him pretty damn well, it's that he covers up any awkwardness or seriousness with humor. Him saying that in a joking manner could have easily been him trying to tell me that that's what he seriously wants to talk to me about. And then my stupid ass close friend had to ruin it. He then after she said that turned around and said "Oh I was only joking, I just wanted someone to talk to." I am so angry now.