Glennleo, you should start an advice collum. That was very well said I could have worded it nearly as well as you have just done bravo!!!
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I wouldn't go that far, but thank you.
As far as the love troubles. If she's avoiding your calls, you did something. Even though you probably don't think you did, you did. I've found trying to cal girl over and over again, just pisses them off. 3 is probably the max amount of times you should call in one day or sitting.
Just approach her at school, and ask her if you guys can talk. Don't put her on the spot right there, but just simply let her know you want to know what you did wrong, or what's going on. Just show some general concern, and it should initiate a conversation at least. It might not save the relationship, but you'll at least know what's going on with it.