You know, I may be out of my league here. I haven't been in college in almost 4 years, and I'm not Asian. I hope that someone else comes along and gives you good advice.
However, I will give you my advice anyway.
First, let's upgrade the basics. With just a simple Google search, here's what I found for hair:
http://www.mens-hairstyle.com/asian-men-hair-trends-2013.html
I personally like this guy's the best:
If you like it too, just bring this picture to a good salon and ask them to cut your hair like this and buy some hair product.
I also like his clothes. Collared shirt. Skinny, black tie. Grey sweater. Nice ring on the finger. Eyes are level (not looking down), and he's got a small smirk (half-smile) on his face. This guy is getting sex with a pretty girl tonight. Be this guy.
Do you have any Asian role models? Any guys in movies or TV or in the music industry that just exude sex appeal to you? If so, try to emulate them.
Read these for more basics:
Newbie Assignment
College Pickup
Don't read too much and get caught up too much on reading and data overload, but definitely read the beginner's and basics articles.
Lastly, with clothes, I don't suggest suits for college. This guy's okay because has a sweater and not a suit jacket, but the tie
may be a little too much. Buy collared shirts and jeans. Small size. Tight fitting. Even if you're fat or super skinny, get clothes that fit tight (not too tight though). Buy a nice ring or a bracelet. Money can be tight in college, so try outlet stores. Chase recommended Guess! to me. They have a discounted section in the back (at least where I live), and it's great.
Next. You're foreign. This adds mystery and intrigue, but it also means you have to approach a little warmer. I suggest a little warmer smile, else you come off a little too intimidating.
Work on making your voice a little deeper and warmer. Again, a movie actor will be great to emulate.
After just a quick search, I like this actor's voice (Takeshi Kaneshiro):
http://www.youtube.com/watch?v=2ueLfruLfVw
And, don't be afraid to make fun of yourself:
http://www.youtube.com/watch?v=POoe6cIYP6s
Lastly, posture and speed. Stand up straight, look ahead, and move
slowly.
Now on to approach. Since direct approach doesn't seem to be working that well, I say we go with indirect. You also have the benefit of being foreign and being able to pretend that you need help. Here's a way you can either make friends or get dates:
You: "Hi, excuse me, can you help me find the library?"
Her: "Yeah, sure, it's right over there."
You: "Oh, thank you. By the way, I am <Name>. What's your name?"
Her: "<Name>"
You: "It's nice to meet you. I'm new at school and trying to make some friends."
Her: "Oh, that's cool."
You: "I was so busy with finding the library... I didn't even realize how pretty you are."
Her: "Really! Haha, thank you."
You: "Would you like to hang out some time?"
The girl will need to be standing around. If she's walking to some place, it'll be hard to converse well. Look for a girl that's just standing around waiting for something or who is just studying outside.
To help with English, I recommend memorizing some default conversations that you may have.
You: "What's your major?"
Her: "Nursing."
You: "Ah, good, so you can save my life if I die from the exams tomorrow!"
Her: "Haha, well, I'm just learning."
You: "Why'd you pick nursing? You just love taking people's blood?"
Or something like that.
Finally... as far as friends, you're in luck. College is packed full of events going on. Go to all of them.
To be honest though, I met most of my friends in college playing soccer and in my dorm. There was a flier for pickup soccer games, so I went and played and met a lot of guys. Do whatever interests you and make friends there.
Just remember, college goes by fast, so don't waste a second!