Three questions about a girl (long story)?

[Aura of Darkness]

OK, this is kind of a long story, so please bear with me. =)

Anyways, there's this girl in my class. One time I sat next to her. She asked me a question about the subject, and we got into a conversation. I introduced myself to her and she did the same. We never got to know each other, but we've made eye contact plenty of times since and we generally smile. I oftentimes would see her looking in my direction during class, and one time I even overheard her giggling when I caught her looking in my direction (at least I think I did). I wondered to myself, "does she like me? What do I do?" Then I'd replace those thoughts with this: "K, she's not interested in you, bro. None of those things mean anything. She probably just thinks YOU like her. Stop being so creepy." Still, I figured there'd be nothing wrong with me getting to know her a bit better, even though I convinced myself that she wouldn't be interested at all.

One day a couple weeks ago, we were both in line to get some food, and then I was like: "Hey (her name), what's up? =)" I forget the details, but it was very light-hearted. Then as I was talking to her, this other guy from the same class came up to the front of the line, they made eye contact, and then they burst into laughter. My first instinct was that the two of them had been talking about me earlier on, joking about how awkward I am. I was like, "what's so funny?" She was like, "oh, nothing. Just an inside joke." Later on I approached her again, asking normal questions like, "do you know him from elsewhere", "what high school did you go to", etc. But by then, my confidence had been shattered, and I wound up asking this: "does it bother you that I keep trying to talk to you?" She replied, "LOL no! Why would I think that?" And yeah, I guess you could say my feelings were really hurt.

The next day, I asked that guy why they were laughing, and he just said that they were ordering the same thing and it was funny. I personally think he's lying, but whatever. Then later I asked, "does (her name) think I'm creepy?" He's like, "I dunno, ask her?" I didn't. From then on, we still smiled at each other in the halls and in class.

A few days ago, I had an outburst in the middle of class. I was entering the room after taking a short break to go outside; I'd been feeling depressed that whole morning. Then I looked at her, she looked at me, and without thinking I awkwardly said "hi." She's like, "hi! =)" Then I went to take my seat, and in the process I turned to that guy I mentioned earlier, and under my breath I said "I bet she thinks I'm creepy." He's like, "K, no offense, but I'm trying to focus on this (his schoolwork) right now." Then I heard people laughing in back, probably mocking how socially inept they think I am, and I turned and was like, "WHAT?!" The teacher told me to go outside, and I wound up going to the councilor's office.

Later that day, I added that guy from school on Facebook. He's also friends with that girl. I decided to send her a message and a friend request. It basically read sort of like this:

"Hey, it's (my name) from school. I saw your profile on (other guy)'s page after I added him.

Add me?"

Since I sent her that message, she has changed her profile pic, so she probably rejected my friend request and ignored my message. Her new pic is with a guy who might be her boyfriend, but either way I'm now pretty sure she's not interested (as if it weren't obvious to begin with). Against my better judgment, I sent another message to try and prod her into a response. I figured I had nothing to lose at this point. If she doesn't reply to this one, I'll just drop the stick and step away from the dead horse. The one I sent basically reads like this:

"By the way, I'm sorry about the way I acted the other day. I was just in a really bad way. It's nothing you caused or anything."

Here are my three questions:

1) Do I sound like a creepy stalker who just doesn't seem to "get it"?
2) What could I do better the next time around?
3) Do you think I'd be making a mistake by sending a message like this:

"Why do you think I'm creepy? What is it specifically that I do that you find to be so creepy? Because obviously you seem to think I like you, and to be honest the only thing I wanted was to be friends (at most). You clearly want me to just leave you alone and take a hint (assuming I'm capable of doing so), but I'd like an answer at least."

[Krystel Zappino]

1) You don't seem like a creepy stalker, your just a boy who likes a girl and your over thinking everything so relax and stop being so negative.

2) Don't be so awkward (no offence) be confident and like I said stop thinking that everything you do is going to have a negative impact.

3) Please don't sent her that message, because if you think that she thinks your creepy now (which I don't think is true) then she is going to think your even worse by sending that message.

Just ask her out because it seems like she likes you too, but like I said be confident, even if you aren't, act like you are but don't be so confident you act like a jerk.