hey guys. I am in need of your advice pleaseee!!

ok, I am a university student first semester and past Wednesday I was in lecture and I saw this girl who was absolutely gorgeous and later same day I went to a class she was in ( I did not know that she would be in it) i could not go my tute so instead i went this one and by coincident she was in the class. She was amazing, down to earth girl. we had an outdoor activity and my friend knows her ( they are in same class) they are real good friends so me, her, my friend and her friend went as a group and it was amazing, we had great fun. and I am really attracted to her.

so the issue is I never see her except maybe for the lecture which is in Wednesday. or unless I go to her same class again. and there is only 1 week left in semester then 3 weeks off then 3 weeks final semester exams and i do not have her number or Facebook or anything so if i do not get them this week, it is a problem.

1- i thought i would write a note to her something witty, she is a swimmer and we talked about swimming and how i can not swim and she afford to teach me. so i though i might write ' hey, when is my swimming lesson ?' then put my facebook or number down, fold it and tell my friend to give it to her during class. if she calls or add me, i know we are good. if she ignores me i lose nothing.

2- or i could ADD her facebook, my friend knows it then text her cause she is a personal trainer too, saying if i can have a training session or talk about the swimming lesson but i thought this would be weird cause she did not give me her facebook. it look like a stalker or something

what idea do you like? and if you have better advice please tell me.

Dude forget that writing her a note or stalking her facebook. Just go find her and get her number and/or facebook from her. You need to take real action or not even bother.

what do you mean?

just grap her after lecture and ask her ' what is your number'? cause there
or what should i do?, cause she might have a class after that she needs to go to and would be rushed.

Don't ask her for her phone number as if she is doing you a favor. Imagine you were just getting a phone number from a guy friend, you wouldn't be like "Hey, would it be alright if I got your phone number?" all like unsure and worried about the outcome. No, you would go up and be like "Hey we should exchange numbers. We can hang out sometime." or whatever. Get my point? It's just casual, no big deal. If she resists the number you can just be like "Or do you have a facebook?"
You don't have to word things the way I do, I'm just trying to make a point. You stop her casually and friendly and suggest the number exchange. If you're calm and it's no big deal to you, her mood will likely reflect yours.

so you think the note is bad idea?
but what if she is on a hurry or with friends would it be worried or random?

Notes are horrible ideas. Period.

what if I see her, make a little chat then give her my personal card or business card

Not horrible - but that puts the ball in her court.

You want her number so you can talk to her on your schedule and you're not waiting on her to contact you -- which she may never do.

ok man I will try to talk to her after lecture.