Do I Have Dysthymia?

Hello, my name is John, I'm 17 and I'm in college. I think I have Dysthymia. Ill start from the beginning, I moved from Hereford to North Yorkshire when I was 11, I left all my friends and was put in a the first year of high school. I was bullied for about 2 years and then it stopped, It destroyed my self esteem and my confidence. All throughout high school I knew I never fit in with the crowd. During my first 3 years I was really depressed, I would not leave the house. Now I'm in college, recently I have feelings of sadness, pointlessness, thoughts of self harm, I have no enjoyment from anything, I'm short with my family, I don't see the point in anything, I just sit in my room at times staring off into space waiting for the day to end. These feelings are ruining my teenage life, I feel like no women would want me and I feel like I'm burdening my friends with these feelings when I tell them..........
Any suggestions would be greatly appreciated
John