Do you think I sound depressed? I don't understand what is going on

I am a 20 year old female.. I have 4 weeks left of university and then my degree is completed. I live with my boyfriend, who I love very much. I am close to my family and friends, and I still have been going out on weekends. But i am always upset. I cry all the time. I am usually a sensitive person, but this is just ridiculous.  I get even more upset at how upset I am. It's so frustrating. I just want to go back to who I was before. I don\'t know why I am feeling this way.. I feel like I should be so happy and lucky with the way my life is going. My friends and family say it must just be that my university work is stressful. And i agree that it is, but I've been at university for 3 and a half years, and it has never made me like this before. Yes, I've been stressed before, but this is just silly. I feel so stupid to be so upset over nothing when there are so many worse off than I am. And i feel so selfish. But i just can't help it... What is wrong with me?

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