I'm sorry for bothering you all, but I'm in a bit of a situation.
I have a friend - he's a really nice, funny guy who I've known for a few years. We have similar interests and get along great. Most people mistake us for brother and sister when they meet us.
He's had a crush on me for god knows how long. I'm an aromantic asexual, meaning I don't feel sexual attraction nor am I interested in a romantic relationship, and had to turn him down. I firmly believe that you should not date someone you don't love - it's bad for both of you.
We had a big talk about it; I explained my feeling, he explained his. He still likes me, but he knows I can't return his feelings. I feel guilty about it, but I'd rather be plagued with that guilt than play with his feelings.
About two months ago, he told me he had a girlfriend. He wouldn't tell me who, but I was happy for him. It ended badly, and he eventually told me it was one of our mutual friends - although I can't really call her that. She's very rude, cruel, and self-centered. She constantly whines to me about her minuscule problems, all the while knowing how much I'm currently going through. We had a big fight and I tried to be the mature one and end it, but she continued to argue with me and declared our friendship over.
Four hours later, she frantically contacts me in every way possible asking for forgiveness. Once again, I chose to be mature and let it go. She thinks she has me completely figured out - that I'm self-conscious and I cry every time I'm alone, blah blah blah.
I'm a tougher than most people - I've been through a lot these past few years. I certainly don't have the time for crying or being self-conscious.
In her apology, she begged me not to hurt myself, as if she actually offended me. I still laugh over that.
Anyway, back to the story.
So, shortly after that, he (My friend - we shall call him N for now)found another girlfriend. I was very supportive of this, and happy that he was getting over me.
That relationship ended (On mutual terms, apparently?), and N spilled everything to me. The girl he had been dating was called Brit, and from what I've heard, an amazing young woman.
But, just last week, they got back together. I was so excited for him - he was tuning into a bit of an emotional wreck.

However, my best friend wants to mess it up.
I've known her since I was five, and we are really close. But she has a weird hate-crush (?) on N. Not anything major, but she IS attracted to him in some way. And she insists she's better than Brit - a fact which I cannot attest to, as I haven't met her yet, although N plans on taking her to the movies and bringing me along so we can meet up. I want her to be comfortable with me being so close with her boyfriend. I don't want to screw things up for them.
But my best friend does. For this purpose, I'll call her B.
I'm terrified - I introduced B and N, and it's pretty much my fault that this is happening. I don't want tot mess this up for N, because he truly is a good guy who deserves a happy relationship.
I sent a message to B a few hours ago, which is as follows:
(Note that the text written in caps is me speaking)

I've completely bagged the shit out of both if em
BOTH OF WHAT?
HIM AND HIS GIRLFRIEND?
yep
DON'T HATE ON HER, SHE SEEMS NICE.
I know, I out witted majorly and know he just can't respond to it
DON'T FUCK THIS UP FOR HIM, OKAY? IF IT DOESN'T GO WELL, YOU CAN PURSUE HIM AS MUCH AS YOU WANT, BUT LET HIM HAVE A MOMENT.
lol, let him have a moment, ur acting like His girlfriend and i are a disease or sumthing
NO, I'M JUST BEING A FRIEND. BUT SERIOUSLY, I WILL GET VERY PISSED WITH YOU IF YOU WRECK THIS.
do u think it will last
I DON'T KNOW.
BUT I WANT TO FIND OUT.
SO DO NOT SCREW IT UP.
Lol, sabotage
NO.
I WILL BE VERY, VERY ANGRY IF YOU CAUSE A PROBLEM.
CONSEQUENCES SHALL FOLLOW.
CONVERSATION OVER.

I then went offline, although she's sent me multiple messages since then.
If she messes with N's relationship with Brit, I'm not sure what I'll do. I don't want to be immature, but I think I'll have to cut off our communication if she does. I've warned her and explicitly stated I don't want her causing them any problems.

I hope that didn't sound TOO douchey D:
Any help or advice? I'm not sure what to do.

All that is, is DRAMA, DRAMA, DRAMA. You can try all you like from keepin' that chicks hair out of the cookie batter,but seeing as we are all human she's bound to fuck up. So I suggest you warn your friend about the chick and just grab some popcorn. Cuz either way shit maybe goin' down.

>>2 That reply.
Was absolutely.
Perfect :D
>>1 Keep calm and be serious with this B chick. Try and get the message across as best as you can.
Good luck.

Try your best to not let it get to you, but it's going to be tough, some people live on drama and others don't.

I would try not to get involved with the drama. Most likely shit will happen, and I'm sure that you want to help, but do not get involved. You can listen to whatever they choose to tell you, but if you personally get involved that will just add onto the drama.

I know you want to help your friend but this is really something that he needs to learn on his own. Think of it as a 'Lessons to be Learned' type of thing.

I think you should let N (He's the guy,right?) what B is doing,along with his girlfriend.I feel like forwarning them will do them good,and prepare them,so that if B does try to sabatoge them,they will know that any lies or rumors she makes up are complete falsaties of her bitchy imagination.Good luck ^-^.