Should I tell my friend I like her?

I have developed a crush on my friend over the past couple weeks, but we never hangout because she has a busy life. I text/Facebook her quite a bit, and both of us initiate the conversations. I'm not sure if she realizes that I am into her "that" way. She said she liked being friends with me a few days ago. I'm not sure if that's hinting at she just wants to be friends, or was just being nice. I'd like to call her and tell her how I feel, but I'm not sure what to say. I'm also afraid this will end our friendship. That's why I'm hesitant and it's the last thing I want to happen. She's all I think about now and with school starting up, it's not a good combo. I've never been in a relationship, so I'm not sure how to go about this. I'm 20 and she's 19
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Maybe instead I can do something for her on Valentine's day?
Should I tell my friend I like her?
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